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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." @& c2 J4 U' {" F! N
Table 2 describes the maximum plug ratings according to the size of cord fitted.& I5 v7 S3 [' G+ K
The usual maximum rating when fitted with 0.75mm cord is 6 Amperes.1 E8 @$ \9 @% S3 }. {& e. _6 M
A 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.% X* d) p9 G, G3 @
The test parameters used during testing of your samples were appropriate to the usual rating of 6A.* [1 T- `- G/ h" j
8 g) j) Y& x" _$ T2 E# lThe purpose of the fuse in the plug is to protect the cord, not the appliance which the cord is connected to.
8 [1 E: ^* T/ \' ], [Table 2 gives the maximum rating of fuse according to the plug rating.' |1 r( l# V) t( j, {4 N
It allows fuses up to 13A to be used with plugs rated 6A, 10A or 13A.& W2 q$ f& z7 o+ \
The plug must be marked with the rating of the fuse link fitted.
- ?6 E( j3 `/ ?6 ?+ H. u9 g* UThis 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.
& {2 [' E4 B' H: w1 k/ ~(An initial higher current such as for motor starting is permitted).
( @8 N9 M }* @- K8 L3 yThe plugs could have lower rated fuses but the marking must always show the rating of fuse fitted.
) D# R! p+ x/ I& E% o7 x0 @Appliance manufacturers may have a preference for the size of fuse. |
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