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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.6 b6 ?; ^& X [9 p0 l( }
Table 2 describes the maximum plug ratings according to the size of cord fitted.
$ w1 b9 E$ \9 V; Y8 J# S0 u5 M. dThe usual maximum rating when fitted with 0.75mm cord is 6 Amperes.
7 k3 o" V& `/ ^3 d3 h6 A3 kA 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.9 T; Q& J) e) s2 \* A
The test parameters used during testing of your samples were appropriate to the usual rating of 6A.2 X8 h6 N* u! X1 U9 E
& t7 n, c) ~) Z9 XThe purpose of the fuse in the plug is to protect the cord, not the appliance which the cord is connected to.
$ O( h! K+ z' C8 e4 \Table 2 gives the maximum rating of fuse according to the plug rating.& P, t% _ s; M$ S0 i1 H% t) e# J
It allows fuses up to 13A to be used with plugs rated 6A, 10A or 13A.& \+ Y& m* A$ v4 H n% I0 R# f
The plug must be marked with the rating of the fuse link fitted. + W5 h/ o! F/ z& x1 K% d
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.: A( v6 x! A9 Z' d- u& N. Z
(An initial higher current such as for motor starting is permitted).
3 a* k1 S W; | _The plugs could have lower rated fuses but the marking must always show the rating of fuse fitted.
0 v- m& S- g5 ~- \Appliance manufacturers may have a preference for the size of fuse. |
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