|
We can try to explain what is permitted by BS 1363-1, even if we cannot always give the reasons for the requirements.- O b. `: x$ F3 D
Table 2 describes the maximum plug ratings according to the size of cord fitted.7 X' T# l7 g/ b7 [& g
The usual maximum rating when fitted with 0.75mm cord is 6 Amperes.; t9 x: I( n( f" J! u+ K
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.* S, G+ Y/ r* V9 X
The test parameters used during testing of your samples were appropriate to the usual rating of 6A.
$ {) `8 W/ d4 ~# y3 A8 ~( B$ v: m' I: a* S
The purpose of the fuse in the plug is to protect the cord, not the appliance which the cord is connected to.7 o' c2 {: e B' n' J5 k
Table 2 gives the maximum rating of fuse according to the plug rating.! g. M. L' ]7 G( M: K. i
It allows fuses up to 13A to be used with plugs rated 6A, 10A or 13A.7 m* @, j( Z8 W8 i/ J' P+ S+ _" _5 ~
The plug must be marked with the rating of the fuse link fitted. 8 y+ C& `3 }, b
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.
) m" M- N) f) t0 f(An initial higher current such as for motor starting is permitted).
+ V2 e% R3 U; p# r% M* q8 qThe plugs could have lower rated fuses but the marking must always show the rating of fuse fitted.7 @ d* }0 Y s) S
Appliance manufacturers may have a preference for the size of fuse. |
|