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We can try to explain what is permitted by BS 1363-1, even if we cannot always give the reasons for the requirements.. x+ o& i6 F3 c; K
Table 2 describes the maximum plug ratings according to the size of cord fitted.
5 J; O: _" F- T' A7 F% zThe usual maximum rating when fitted with 0.75mm cord is 6 Amperes.
% P) n9 ^( h5 ^8 \* Y/ b9 B; {" K5 u) @' EA rating of 10 Amperes can be assigned, provided that the cord length is no more than 2 metres and the parameters for testing at 10 Amperes are used. These are more onerous than for 6A.
3 D Y% A& \1 E0 J- `. kThe test parameters used during testing of your samples were appropriate to the usual rating of 6A.
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# B& `5 a8 E7 P8 u% A& |9 OThe purpose of the fuse in the plug is to protect the cord, not the appliance which the cord is connected to.1 j9 L: Z+ F2 d5 t3 s# k) r/ {
Table 2 gives the maximum rating of fuse according to the plug rating.. z' ]0 L7 e! W7 \, X& e
It allows fuses up to 13A to be used with plugs rated 6A, 10A or 13A.
; j9 |9 z% J2 }# eThe plug must be marked with the rating of the fuse link fitted. 4 k' L$ [: ]& }: \! |
This means that your plugs with 0.75mm cord are rated 6A but could have a 13A fuse and be marked 13A, but they must not be supplied for use where the rms current exceeds 6A.
! b. R- B6 m# f(An initial higher current such as for motor starting is permitted).
6 T( d* y4 n. S6 I6 c$ k% yThe plugs could have lower rated fuses but the marking must always show the rating of fuse fitted.
9 b+ n# Z2 J0 G. L* AAppliance manufacturers may have a preference for the size of fuse. |
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