BS546-1950 WO-POLE AND EARTHINGPIN , PIIUGS, SOCmT-OUTmTS AND SOCKET-OUTLET ADAPTORS A 3 – FOR AC (50-60 HZ) CIRCUITS UP TO 250V

This British Standard relates to plugs (fused and non-fused), socketoutlets (shuttered and non-shuttered), and fused socket-outlet adaptors(shuttered and non-shuttered).

For the purpose of this standard the following definitions shall
apply :-
a. Plug. A device carrying three metallic plug pins substantially cylindrical in form intended for engagement with corresponding socket contacts or adaptor contacts and arranged for connection to a 3-core flexible cord or cable.
b. Fused-plug. A plug with a fuse_link within it in circuit between the line plug pin and its terminal.
c. Socket-outlet. A device carrying three metallic socket contacts designed for engagement with corresponding plug pins or adaptor pins and arranged for connection to fixed wiring .

d. Shuttered socket-outlef. A socket-outlet having provision for scrxning its line and neutral socket contacts automatically with a shutter when they are not in engagement with corresponding plug pins or adaptor
pins.
e. Socket-orrtlet adaptor. A device carrying three metallic adaptor pins substantially cylindrical in form (called the ‘plug portion’) intended for engagement with corresponding socket contacts, and also carrying one or more sets of adaptor contacts (called ‘outlets’) intended for engagement with corresponding plug pins. A fuse is fitted in the socket-outlet adaptor for each outlet of smaller current rating than that of the plug portion.
f. Shuttered socker-ourlet adaptor. A socket-outlet adaptor having provision ‘for screening each of its line and neutral adaptor contacts automatically with a shutter when they are not in engagement with corresponding plug pins.
g. Type test. A test of an article intended to show that all other articles made to the same design would, or would not, pass an identical test.
h. Sampling test. A test of a relatively small number of articles selected from ;L batch, intended to show that all other articles of the same batch would, or would not, pass an identical test. or slot in which it is secured by the end of a screw the axis of which is at an angle to the wire.

LISUN following instruments fully meet BS546-1950 WO-POLE AND EARTHINGPIN , PIIUGS, SOCmT-OUTmTS AND SOCKET-OUTLET ADAPTORS A 3 – FOR AC (50-60 HZ) CIRCUITS UP TO 250V