GB2126023A - Cable-to-wiring device adaptor for mains electrical installations in buildings - Google Patents

Abstract

The Adaptor forms a flexible link between the stiff wires (E) of a mains circuit cable entering a mounting-box or casing (B), and the terminal of a wiring device (not shown). The adaptor comprises a flexible wire (F) for each pole of the mains wiring and, attached to each wire (F) an insulated screw terminal block (A) for receiving one or more stiff mains circuit cables. The free end of each wire (F) is adapted to be attached to a wiring device for easy mounting thereof in a wall box (B) or the like. In other embodiments, different ways of attaching the flexible wire to the terminal block or the wiring device are disclosed. The Adaptor is designed to suit existing accessories and components without the need to modify or re-design. <IMAGE>

Description

SPECIFICATION Cable-to-component interface adaptor for electrical installations in buildings This invention relates to the installation and electrical connecting-up of electrical Switches, Switched Sockets, Sockets, and all similar and like Components and/or Accessories in Circumstances where these are attached to walls and other surfaces by means of a Mouning-Box, Casing, or similar or like device through the sides, top, bottom or back of which Box or Casing pass cables or wires of the electrical circuit in order that the bared ends of such wires may be connected to the Terminal Points or Connections of the Switches, Switched Sockets, Sockets, and similar and like Components and/or Accessories, (hereinafter referred to collectively by the term: "Components").Current practice in such installation and connecting up is such that the aforementioned individual wires of the circuit cable are securely connected directly to their correct Terminal Points or Connections in the Component, after identification of their electrical polarity by means of: a. Indelible colour-coding of the insulation of the wires, and:- b. Letter-coding of the Terminal Points or Connections, such codings being adjacent to each, to indicate whether "Live", "Neutral", or "Earth".

Such direct connection, due to the inherent stiffness or rigidity of the wires, and their resistance to bending into the required shapes and directions, causes difficulty when the Component is at the stage when it is to be mounted into the Mounting Box or Casing to which it is attached by long screws. In addition the wires can become trapped between the Component and the Mounting Box or Casing with the possibility of damage to their insulation and the consequent danger of a short-circuit. A further difficulty is that a rigid wire which has not been precisely routed may be "bored" into by the incoming aforementioned long screws which secure the Component to the Mounting Box or Casing, with the possibility of causing a short-circuit.

During the life and service of the Component it may require to be removed for inspection, maintenance or replacement purposes, and whenever this occurs the wires attached to the Component must again be bent and distorted which may result in fatigue of the metal comprising the core of the wires, with the possibility of fracturing, and also the possibility of a reduction in cross-sectional area, leading to the possibility of a localised rise in temperature at that point, and a failure of the wire(s).

The object of this Invention is to provide an improved method of electrical installation and connecting-up of all forms of Component aforementioned, and also to make such installation and connection simpler and easier to carry out, with a betterment in both the safety factor and a standardisation of quality of workmanship of the installing tradesman. In addition the Invention carries these objects forward to any later operations on the Component and its Mounting Box or Casing for the purposes of inspection, maintenance or replacement aforementioned.The principle of this Invention is that it will provide an interposition or interface between the wires of the circuit cable and the Terminal Points or Connections of the Component, this interface or interposition, (hereinafter referred to as the "Adaptor") being provided at one of its ends with suitable connections which accept and secure the wire(s) of the circuit cable(s) and at its other end with suitable wire of a flexible nature and properties having prepared ends for connection to the Terminal Points or Connections of the Component thus wholly or partially resolving the difficulties of installation and/or removal of the Component as aforementioned. (Drawings Nos. 1 to 11 attchd).This invention may comprise a device of any desired shape or size, (and hereinafter referred to as the "Adaptor Block"), which encloses and insulates metal bars, rods, tubes, or other approved means of carrying electrical current of the designed capacity of the proposed installation, (and hereinafter referred to as the "Conductors"), of suitable size and crosssectional area which have at one end a suitable and approved means of attachment for the connection of the individual wires of the circuit cable, and at the other end, or at any suitable or desired point along their lengths, an approved means of attachment for flexible wires, (hereinafter referred to as the "Flexible Leads"), these being of any suitable electrical capacity, length, materials and construction to meet the standards required by all relevant approving bodies, and whose outer insulation materials are suitably and indelibly colour-coded to indicate their individual polarities. (Drawings Nos. 1 to 11 attached).

The adaptor block Manufactured to any suitable size or shape the Adaptor Block may be made of any suitable approved material having the desired insulation properties, chemical and thermal stability, and moulding, shaping, machining or other manufacturing properties and qualities to enable its correct and efficient forming. The Adaptor Block may be manufactured either as one piece, or in several parts which can be joined together by any suitable means, either to achieve permanent bonding together, or in such a way that the Adaptor Block may be dismantled into its several parts and re-assembled as desired by the manufacturer or other persons.

The manufacture of the Adaptor Block may be such that it carries inside suitable grooves, profiles, apertures or spaces for both the accommodation of the Conductors and to permit the entry and correct approved attachment of the circuit cable wires and the Flexible Leads.

The Adaptor Block may have for its attachment to the Mounting Box or Casing any suitable approved device such as a Grommet, or Grommets, Pegs, Plugs, Threaded Fasteners, Adhesive Pads or other like devices to enable its secure and positive location within the Mounting Box or Casing, and these means of attachment may be an integral part of the material comprising the Adaptor Block or such that they are separate, but capable of being attached during manufacture, or at a later time, to the Adaptor Block and to any suitable or desired part of the Mounting Box or Casing, or said Block may remain unattached to said Box or Casing.According to one embodiment of this Invention, the Adaptor Block is secured to any one of the "knock-out" cable access holes in the Mounting Box or Casing by means of a thin Grommet, or Grommets, whose shape is such that a small protrusion may be "snapped-in" or screwed in to any of a number of holes in the material of the Adaptor Block, these holes designed and placed to offer a number of convenient alternative points for the attachment of the Adaptor Block in a selection of positions in relation to the Mounting Box or Casing, and to the Component so that optimum positioning of the Adaptor Block may be arranged by the installing tradesman.

According to one embodiment of this Invention the Adaptor Block may be provided with a removable cover of suitable approved material and shape and means of attachment to the Block and fashioned in such a manner as to enable it to be "snapped-on" to the Adaptor Block after electrical connections have been completed with the object of covering and insulating the Clamp Screws or other otherwise exposed metal parts, and easily removed when access to such parts is required during later disconnection, inspection, maintenance or replacement.

According to one embodiment of this Invention Adaptor Blocks may be designed constructed and manufactured to accept only one Conductor, and these will hereinafter be referred to as "Single Polarity Adaptors". According to one embodiment of this Invention Single Polarity Adaptors may be installed without their attachment to the Mounting Box or Casing, or may be attached to the Mounting Box or Casing either singly, or in company with other Single Polarity Adaptors of the same, or of different polarity but part of the same installation, such attachment to be by any suitable approved means, for example::-- Grommets, Brackets, Plugs, Pegs, Threaded Fasteners, Adhesive Pads, or any like device or devices designed to ensure secure and positive attachment and location within the Mounting Box or Casing, and these means of attachment may be an integral part of the Adaptor Block, or such that they are separate, but capable of being attached during manufacture, or at a later time to the Adaptor Block and to any suitable or desired part of the Mounting Box or Casing.

According to one embodiment of this Invention Single Polarity Adaptors may be furnished fitted or supplied with a slideable sleeve of suitable shape and material for the purpose of covering and insulating the otherwise exposed end of the end of the Conductor at the point at which this receives the wire or wires of the Circuit Cable or Cables the design of said sleeve to be such that it cannot inadvertently or accidentally be dislodged, and that it satisfies the requirements and standards of the relevant approving bodies.

According to one embodiment of this Invention Single Polarity Adaptors and Double-Ended Adaptors, together with all other Adaptors described herein may be fitted outside the Mounting Box or Casing, subject to the requirements and standards of the relevant approving bodies, thereby obviating the necessity of passing the Circuit Cable or Cables into the Mounting Box or Casing, and thereby offering a greater amount of space within the Mounting Box or Casing for the installation, fitting or insertion of both the Flexible Leads and the Component.

According to one embodiment of this Invention, when any Adaptor described herein is.fitted outside the Mounting Box or Casing it may be furnished fitted or supplied with an outside covering of suitable shape and material fashioned and attached in such a way that it resists or prevents the ingress of water or any other material into the Adaptor or any of its component parts and/or into the Mounting Box or Casing.

The conductors The Conductors may be manufactured to any desired and suitable shape, and of any suitable metal or other material having the desired current-carrying capacity and chemical and thermal stability, and possessing the necessary moulding, shaping, machining and other manufacturing properties and qualities to enable them to be correctly and efficiently formed and to receive the approval of the relevant bodies concerned with standards.

The Conductors may be formed at one end to receive and make a secure and approved efficient connection with a wire or wires of the Circuit Cable or Cables, for example:-- by means of Clamp Screws, Crimping, Soldering, Brazing, Welding, Swageing, or other approved means, a suitable hole being provided in the material of the Conductor for the entry of the said wire or wires.

The Conductors may be formed at their opposite ends with the same device or means of attachment as hereinafter detailed in the case of Double Ended Conductors later described.

The Conductors may be formed at their opposite ends or at any point along their length in such a manner as to permit the secure efficient and approved attachment of the Flexible Leads, for example: by means of Clamp Screws, Crimping, Soldering, Brazing, Welding, Swageing or other approved means.

According to one embodiment of this Invention each Conductor may be fitted, installed or mounted in a separate Adaptor Block from other Conductors in the same installation, and this assembly will hereinafter be referred to as a "Single Polarity Adaptor".

According to one embodiment of this Invention the Conductors utilised in Adaptors intended for installation in applications which form a part of a "Ring-Main" type of electrical circuit may be formed in such a manner as to have at each end a suitable approved secure and efficient connection for the wires of the circuit cables, with the connections or connecting points for the attachment of the Flexible Leads at any desired point along their length, these connections being made as aforesaid. This form of Conductor will hereinafter be referred to as a "Double-Ended Conductor".

According to one embodiment of this Invention the Conductors utilised in Adaptors intended for installation in applications which form part of a "Ring-Main" type of electrical circuit may be formed in such a manner as to have the ability of the attachments for the wires of the circuit cables such that they are capable of accepting at one end only the respective wires of both circuit cables i.e. large enough for the two wires of each polarity to be fitted into a single connection-point of each Conductor.

(Drawings Nos 1, 2, 3, 4, 9). As to the inter-relationship of the Conductors with the Adaptor Block, each may be fitted, installed, mounted or otherwise entered into the said Block by any suitable approved and desired means, for example: "moulded-in" during the manufacture of the said Block, or a "push-fit" into the aforementioned suitable grooves, profiles, apertures or spaces contained within the said Block, or a "snap-in" fit in circumstances where the said Block as been manufactured in separate sections or parts as aforementioned, or a Conductor may have no block, but be insulated by means of a slideable Insulator Sleeve, as aforementioned.

The flexible leads The Flexible Leads may be manufactured from any suitable approved materials. The multiplestranded core wires may be of any approved metal or other material capable of carrying the specified current of the electrical installation for which it was designed and/or specified, for example: Copper.

The Flexible Lead cores should be designed, specified, or selected to offer the maximum possible flexibility consistent with design and specification requirements, safety and other standards relevant to both components and the installation concerned, and considerations of cost.

The Insulation materials used in the manufacture of the Flexible Leads should also meet the aforementioned criteria stated for the core wires above and also offer a suitable, approved and desired level of insulation of the electrical current, together with chemical and thermal stability. In addition the materials used must be capable of offering colour indelibility to enable the insulation sheath around each wire to be positively identified as to its correct polarity by means of accepted approved colour codes. The Flexible Leads may be attached to the desired parts of their respective Conductors by any approved and suitable means, for example: By Clamp Screws, Crimping, Soldering, Brazing, Welding, or Swageing, as aforementioned under "CONDUCTORS".

The Flexible Leads will be of such a length that they offer to the installing tradesman greater facility in connection and fitting of the Component to the Mounting Box or Casing, without eventually occupying an unduly large amount of space behind the Component during and after its mounting into position.

The ends of the Flexible Leads which are intended for connection to the Terminal Points or Connectors of the Component may be prepared by the manufacturer in such a way as to prevent said ends from fraying and to facilitate their connection to the Component, for example:- By soldering, welding, brazing, or any similar approved means, or by the attachment in approved manner of suitably shaped end-pieces, (e.g. Pins) made of suitable electrically-conductive materials, insulated where necessary. (Drgs. 9, 10, 11).

According to one embodiment of this invention in additional Flexible Lead of "Earth" polarity and correct colour-coding may be attached with the like "Earth" Flexible Lead aforementioned by the manufacturer, said Lead for connection to the "Earth" terminal of the Mounting Box or Casing for the purpose of completing the "Earth" continuity circuit as required by existing standards and current practice.

According to one embodiment of this Invention the aforesaid additional "Earth" Flexible Lead may be furnished or supplied by the manufacturer unattached to the "Earth' Conductor, but separate, for attachment fitting or connection at one end to the Terminal Point or Connection marked "E" of the Component, and at the other end for attachment fitting or connection to the "Earth" terminal of the Mounting Box or Casing for the purpose of completing the "Earth" continuity circuit as required by existing standards and current practice.

According to one embodiment of this Invention Flexible Leads may, subject to the approval of bodies concerned with standards, be connected at their one end to one or more wires of the Circuit Cable or Cables outside the periphery of the Mounting Box or Casing, with or without the inclusion of an Adaptor Block, and in a like form, configuration or manner to the aforementioned Single Polarity Adaptor, and furnished, supplied or fitted with a slideable sleeve of suitable shape, size and material for the purpose of covering and insulating the otherwise exposed metal parts of the Conductor and/or the Flexible Lead.

According to one embodiment of this Invention when a Flexible Lead or Leads are fitted outside the Mounting Box or Casing, as aforementioned they may be secured in position by any approved suitable form of attachment device to either the Mounting Box or Casing or to the wall or other structure to which said Box or Casing is attached.

According to one embodiment of this Invention when a Flexible Lead or Leads are fitted outside the Mounting Box or Casing they and the Circuit Cables to which they are attached may be covered and further insulated with an outside covering of suitable approved shape and material fashioned and attached in such a way that it resists or prevents the ingress of water or any other material into the assembly of Flexible Leads and Circuit Cable or Cables and also the Mounting Box or Casing.

Numerical Index to drawings attached +Please refer to pages 5 and 6 for key to alphabetical symbols used in the drawings.

N.B. A wide range of possible variations of shape, size and general format of the Invention is possible, and, whilst the applicant is anxious to ensure full Patent protection, exhaustive illustration of every variant would require a very large number of Drawings, many showing only slight differences to others.

Drawing No. Notes.

1. General arrangement of an Adaptor designed to carry all polarities within one Adaptor Block, (multiple polarity type). Whilst Clamp Screws are shown for the securing of the Wire(s) the alternative securing methods described in the text of the Description also apply This Drawing shows a Ring-Main installation, in which each Conductor receives two Wires; the Adaptor could equally weli be for other types of installation, e.g. Lighting, Spur, and others in which each Conductor would receive only one Wire.

The Adaptor Block shown may be fitted with a Detechable Front Cover, (item "D" in following notes on symbols employed), or with a Removable Portion, (item "R" in following notes), or the Clamp Screws, (item "H" in notes) may fit into recess holes in the Adaptor Block.

2. Schematic representation of a Multiple Polarity type of Adaptor with Clamp Screws assembled to the Wires of the Circuit Cable, and fitted within a Mounting Box or Casing, (item "B" in following notes). The Adaptor may be attached, if desired, to item "B" by any of the approved methods described in the text of the Description, or may remain unattached.

All comments applying to Drawing 1 above apply to Drawing 2.

3. Drawing 3 shows two of the possible variations of a Single Polarity Adaptor: Fig. 1. Side and Front Views of an Adaptor fitted with Clamp Screws for retention of the Wire(s) of the Circuit Cable(s) of like polarity.

Fig. 2. Side and Front Views of an Adaptor not fitted with Clamp Screws, but utilising another approved means of retention of the Wire(s) of the Circuit Cable, e.g. Crimping.

N.B. Either of the above may be insulated by either fitting into an Adaptor Block suitably formed, and with detachable or removable parts for access, or each may be insulated by means of a slideable Sleeve, (item "S" in following notes) 4. Drawing No. 4 shows the Adaptors illustrated in No. 3 above schematically installed within a Mounting Box or Casing, and connected to the Wires of the Circuit Cables.

The illustration shows an installation suitable for a Ring-Main Circuit, but the Adaptors are equally suitable for other installations, e.g. Lighting, Spur, and others, in which each Adaptor would receive only one Wire. (see also Drawing No. 6).

5. Drawing No. 5 shows an Adaptor similar to that illustrated in Drawing Nos. 1 and 2 installed in a non Ring-Main type of installation, e.g. Lighting, Spur, or like circuit, in which each Conductor receives only one Wire of the Circuit Cable.

6. Drawing No. 6 shows Adaptors similar to those illustrated in Drawing Nos. 3 and 4, installed in a non Ring-Main type of installation, e.g. Lighting, Spur, or like circuit, in which each Conductor receives only one Wire of the Circuit Cable.

7. Drawing No. 7 shows a multiple-polarity Adaptor which utilises a special Grommet attached to its base to both insulate and prevent chaffing of the incoming Circuit Cable, an also uses the same Grommet as a mounting method for the Adaptor, since the Grommet fits into the "knock-out" hole of the Mounting Box or Casing.

Drawing 7 further shows the type of Adaptor employing recessed Clamp Screws to secure the Wire(s) of the Circuit Cable.

8. Drawing No. 8 illustrates a basically similar Adaptor to that shown in Drawing No. 7, but may employ either Clamp Screws or Crimping, or other means of securing the Wire(s) of the Circuit Cable, the Conductors being insulated by a Detachable Front Cover, (item "D" in following Notes), a Removable Portion (Item "R" in following Notes) for the purpose of access to the Conductors, Wire(s) and Flexible Leads.

9. Drawing No. 9 shows an example of a Flexible Lead Adaptor at one end of which the Wires from the Circuit Cable have been secured by means of a Crimped Adaptor Block; at the other end of the Flexible Lead are shown three alternative and optional possible ends for connection to the terminal holes or other connections of an accessory or component, these being respectively designated F(PPE); F(MPS); F(MPA), (pages 1 9 and 20 for definition of terms used).

10. Drawing No. 10 shows in detail one of the optional ends of the Flexible Lead Adaptor shown in Drawing No. 9; namely the F(MPS).

11. Drawing No. 11 shows in detail one of the optional ends of the Flexible Lead Adaptor shown in Drawing No. 9; namely the F(MPA).

Key to alphabetical symbols in drawings N.B. Meaning of individual letters remains same throughout all drawings.

Symbol Meaning A. ADAPTOR BLOCK, or any variant thereof, including Single Polarity Adaptors which may not have a Block as such, but be insulated by a slideable insulating Sleeve, (item "S" below).

B. MOUNTING BOX or Casing to which the Component is attached.

C. CIRCUIT CABLE at the point at which this enters or leaves "B".

D. DETACHABLE FRONT COVER of Adaptor Block, permitting access to Conductors, and, where fitted, to Clamp Screws, (see also item "R" below).

E. ELECTRICAL WIRES exposed as a result of the cutting-away of the outer insulation material of the Circuit Cable(s).

F. FLEXIBLE LEADS attached by the manufacturer to the Conductors, having prepared ends for attachment to the Terminal Points of the Component.

G. GROMMET. Either traditional rubber type in current use, or any variant of this which serves to prevent chafing of the Circuit Cable on the edges of the knock-out access holes in the Mounting Box or Casing.

G(M). MOUNTING GROMMET used to locate and secure Adaptor in the Mounting Box or Casing, and which may or may not be fashioned so as also to introduce the Circuit Cable into the Mounting Box or Casing, as in the case of a Split Grommet.

H. CLAMP SCREWS fitted in Conductors for the purpose of securing the bared ends of the electrical wires of the Circuit Cable either in pairs of like polarity, or singly, depending upon the type of installation, (e.g. Lighting, Spur, Ring Main). Clamp Screws may be recessed in the material of the Adaptor Block, or insulated by means of a Detachable Cover (item "D") or insulated by means of covering with a slideable Sleeve (item "S").

H(C). Applies to the CRIMPED type of Conductor end designed to secure the wire(s) of the Circuit Cable by means of crimping or like method as opposed to the use of Clamp Screws for this purpose.

S. SLIDEABLE SLEEVE or a like insulating device which can be slid or otherwise moved or secured into position to insulate the bared end(s) of Conductors and the Clamp Screws, (where fitted). Principally intended for Single Polarity Adaptors but may be fitted to other configurations of Adaptor as desired or deemed necessary.

M. METAL CONDUCTOR which both connects the wire(s) of the Circuit cable together (as in Ring-Main Installations) and connects them to the Flexible Leads. A metal conductor may have Clamp Screws, (item H) for this purpose, or a portion of itself which permits Crimping, or a like approved means of attachment for the said wires, as with those Conductors marked H(C). in the attached Drawings.

R. REMOVABLE PORTION denotes any Adaptor Block so designed as to permit a portion of itself to be removed for access to the Conductors and the electrical wire(s).

Differentiated from item "D" in that a Removable Portion is an integral part of the main body of the Adaptor Block and contributes both to the insulating properties of said Block and to the secure attachment and retention within the Block of the Conductors, Wire(s) and Flexible Leads.

"X"-"X". This symbol denotes the extremities of a line along which Detachable Front Covers (item "D") or Removable Portions, (item "R") may be detached from the Adaptor Block assembly (item "A"), and later re-attached as desired for the purpose of access to the Conductors, Wire(s) and Flexible Leads.

F(PPE). Flexible Lead with Plain Prepared End.

F(MPS). Flexible Lead fitted with a Pin, made of metal or other suitable conducting material, of Straight configuration, and suitably insulated at the juncture of said Pin and the Flexible Lead, as shown in Drawing Number:-- 10., the Pin being the means of attachment of the Flexible Lead to the Terminal Holes or other connection points of the Accessory or Component.

F(MPA). As F(MPS) above with the sole difference that the Pin is fitted at an angle to the centre line of the Flexible Lead as opposed to the Straight configuration of F(MPS).

IFLS Insulator for either F(MPS) above, or F(MPA) above, fitted with a Flange/Stop, and either moulded about the juncture of the Pin with the Flexible Lead, or fitted by any other suitable and approved means.

I. Denotes an Insulator, or that part of IFLS above which surrounds and retains the juncture of the Pin and the Flexible Lead.

SL. A Slot cut or otherwise formed or machined in the Pin to assist in the frictional retention of said Pin in the Terminal Hole or other connection point of an accessory or component, and also permits adjustment of the effective outer diameter or parallel configuration or tapered configuration of the stem of said Pin in order to effect the frictional retention of the Pin as aforementioned.

MP. Pin manufactured of metal or other suitable electrically-conductive material, fashioned in the manner shown in F(MPS) or F(MPA) above, (Drawings Numbers:-- 9; 10; 1 1.), or other suitable configuration fitted to Flexible Leads as an alternative to F(PPE) above, for the purpose of connecting the ends of Flexible Leads to the respective Terminal Holes or other connection points of an Accessory or Component. Fitted by pressure into said Holes or points the Pins may be retained by friction or by clamp screw or other suitable means.

OG. Optional Groove which may be cut, machined or otherwise formed at a suitable position in the stem of F(MPS) or F(MPA) above, or any other configuration of such a Pin as desired for the purpose of receiving the end of the shank of a clamp screw or any other means of positive retention in the terminal holes or connection points of an accessory or component.

FC. Denotes the wires comprising the core of a Flexible Lead.

Claims (9)

Claims

1. An electrical adaptor comprising a length of suitable electrical flexible insulated wire, to one end of which is secured an outwardly-insulated electrically-conductive attachment device connectable during installation to one or more wires of like polarity of electrical circuit or system cables, the other end of which electrical adaptor is connectable to the appropriate Terminal Holes or Connection Points of electrical Accessories, Components or Mounting Boxes or other Casings, such as are installed in Buildings and like Constructions, permanent or temporary.

2. An electrical adaptor as claimed in Claim 1, in which the outwardly-insulated eiectricallyconductive attachment device is connectable to the wires of an an electrical circuit or system by means of "crimping" with an appropriate crimping tool, i.e. the attachment device is a "compression terminal".

3. An electrical adaptor as claimed in Claim 1 , in which the outwardly-insulated electrically conductive attachment device is connectable to the wires of an electrical circuit or system by means of at least one Clamp Screw, (otherwise known as a Pinch Screw) threaded into the material comprising the electrically-conductive core of the attachment device.

4. An electrical adaptor as claimed in Claim 1 , in which the outwardly-insulated electrically conductive attachment device is connectable to the wires of an electrical circuit or system by any other suitable and acceptable means.

5. An electrical adaptor as claimed in Claims 1 2, 3 and 4, in which the end of the flexible insulated wire remote from the aforementioned attachment device, and intended for connection to the Terminal Holes or Connection Points of electrical Accessories, Components, Mounting Boxes or other Casings is left unprepared by the Manufacturer.

6. An electrical adaptor as claimed in Claims 1, 2, 3 and 4, in which the end of the flexible wire specified in Claim 5 is prepared by the manufacturer by the stripping-off of an appropriate length of insulating material.

7. An electrical adaptor as claimed in Claims 1, 2, 3 and 4, in which the end of the flexible wire specified in Claim 5, is prepared by the manufacturer by the stripping-off of an appropriate length of insulating material,'and the application to the bared wires of a suitable anti-fraying material: e.g.

soldering, brazing, etc.

8. An electrical adaptor as claimed in Claims 1, 2, 3 and 4. in which the end of the flexible wire specified in Claim 5, is prepared by the manufacturer by the attachment of a suitable and acceptable Pin, Cap, Connector or Joiner to match the shape, form or configuration of the Terminal Hole or Connection Point of the Accessory, Component, Mounting Box or other Casing to which it is to be connected.

9. An electrical adaptor in any one of the forms, variations, styles or configurations as described herein, with reference to Drawings Numbers:- 1 to 11 inclusive accompanying this application.