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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.- b) N/ l6 I$ ^# Y5 A6 v
Table 2 describes the maximum plug ratings according to the size of cord fitted.
; F H. H! }6 |* _$ D$ MThe usual maximum rating when fitted with 0.75mm cord is 6 Amperes.1 c# u0 }: w9 i* F
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.
0 ~2 |: K* m. Q& q' m SThe test parameters used during testing of your samples were appropriate to the usual rating of 6A.
& R! X% r8 X) v% R2 Q( F o: a: I: H- v! }
The purpose of the fuse in the plug is to protect the cord, not the appliance which the cord is connected to.
/ A( k& G- F: I: g+ LTable 2 gives the maximum rating of fuse according to the plug rating.
, @% P8 K; ^; N# b0 _7 kIt allows fuses up to 13A to be used with plugs rated 6A, 10A or 13A.
+ f; Z" R1 o( a s. [1 DThe plug must be marked with the rating of the fuse link fitted.
. [: u6 N) a' ?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.5 Y0 \/ \3 @1 ~
(An initial higher current such as for motor starting is permitted).
9 p% A/ }0 Y1 bThe plugs could have lower rated fuses but the marking must always show the rating of fuse fitted.
+ H( |8 e6 L5 IAppliance manufacturers may have a preference for the size of fuse. |
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