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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.; w/ R5 O# x8 V2 Q1 K! R
Table 2 describes the maximum plug ratings according to the size of cord fitted.
! t; m6 C% M. c. h% k9 gThe usual maximum rating when fitted with 0.75mm cord is 6 Amperes.2 E9 d* O% c. P: d
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.9 F% X1 z4 g( D" d: t6 c F' Y
The test parameters used during testing of your samples were appropriate to the usual rating of 6A.2 @* U; R) O; x9 U2 N
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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.
5 V1 r; v1 {8 E+ x+ eTable 2 gives the maximum rating of fuse according to the plug rating.$ w' r, s2 t) j7 O: s
It allows fuses up to 13A to be used with plugs rated 6A, 10A or 13A.
9 x( a. p$ o' S& p4 c4 DThe plug must be marked with the rating of the fuse link fitted. 7 w3 X- o. v" Q! t
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./ Z; ?! \: f2 U8 f# p4 b$ R
(An initial higher current such as for motor starting is permitted)., k! L; s3 k2 ]: D2 \/ x
The plugs could have lower rated fuses but the marking must always show the rating of fuse fitted.
; A( H! `* k* O' j% kAppliance manufacturers may have a preference for the size of fuse. |
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