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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.: L* [7 r7 m4 X! R( ~+ ]5 m1 I
Table 2 describes the maximum plug ratings according to the size of cord fitted.; e) ?# y1 L; d/ Y
The usual maximum rating when fitted with 0.75mm cord is 6 Amperes.
, U. s' T" J8 K8 z6 P/ XA 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.
( k8 i6 \: v' R; ~The test parameters used during testing of your samples were appropriate to the usual rating of 6A.1 s# @ s+ ^6 z- V4 d
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The purpose of the fuse in the plug is to protect the cord, not the appliance which the cord is connected to.* x+ Q" b: {" `% K7 J: r7 ?4 q
Table 2 gives the maximum rating of fuse according to the plug rating.- z' x6 A1 F1 x* O2 W: f
It allows fuses up to 13A to be used with plugs rated 6A, 10A or 13A.1 ]( `; K2 n7 f( |( I; x
The plug must be marked with the rating of the fuse link fitted.
0 S. D9 A0 \& q7 n) v+ gThis 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.
! i1 T8 {! Y& J; B3 y8 m0 A1 S(An initial higher current such as for motor starting is permitted).
5 N9 ]. z/ m# ? RThe plugs could have lower rated fuses but the marking must always show the rating of fuse fitted.
9 T: v' {/ u5 v/ {3 c6 E2 |* t9 `Appliance manufacturers may have a preference for the size of fuse. |
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