They're
not. Last time I looked, MK (large, and good, manufacturer of
plugs, socket outlets, light switches, etc), listed their 13A BS1363 plug
with either a 3A or a 13A fuse pre-fitted. The fact that very few
companies stock the former is a problem, though.
Ahh that's probably why I've only ever seen them supplied with 13A fuses :)
Why plugs pre-fiotted with 3A fuses are so hard to obtain is beyond me.
A local large department store once (apparently) mis-ordered MK mains
plugs and got the ones with 3A fuses. Which they then sold off at a
bargain pricee. I think I bought their entire stock (something like 50
plugs). I've used them all up now, and I don't think I put a 13A fuse in
any of them (Of course the MK plug pre-fitted with a 3A fuse is
indentical (apart from the fuse) to the one with the 13A fuse pre-fitted,
so it's quite save to put a 13A fuse in it).
I don;t
beleive you should ever fit a 1A fuse in a BS1363 mains plug. I
have never need a 1A fuse that complies with BS1362 (the lowest rated
such fuse I've seen is 2A), the 1A fuse may not be able to stand the
fault current without exploding, say.
Humm Farnell stock 1A fuses to BS1362 :
http://uk.farnell.com/bussmann/c180-1/fuse-quick-blow-1a-bs1362/dp/1123029
So I would assume that it is ok to use them.
Interesting. Last time I looked (admittedly it was some years ago), the
1A fuse was not compliant with BS1362, all the others were. I will check
again...
I regard those
moulded-on plugs as being dangerous!. They do not have
proper strain-releive for the cable (many times the outer sheath has
pulled out of the mounted plug body, you xan't check the wires are
properly connected (not just haning on a couple of strands), darn it,
I've had them with live/neutral reversed.
Ahh but that's what regular PAT testing is for, as the case you cite is
I don't much care for PAT testing either, at least not as it's usually
done I do check just about everything I use for earth leakage and earth
ocntinuity (at suitable test voltages and currents respectively), and I
recheck every year or so. But I look at the values of the resistances,
etc. A device may still have an earth leakage resistance way over the
legal limit, but if it's dropped from say 1GOhm to 10MOhms, I want to
know why. Most PAT testers won't pick that up.
an imediate fail, at which point the remedial action
would be to cut off
the molded plug and correctly fit a BS1363 one :)
Which I would have done anyway...
Having live and neutral reversed is a more serious problem however :)
And which PAT testing won't detect.
I;'ve seen a device which had a single-pole switch in one wire and a
single pole fuse i nthe otehr wires -- I can't rememebr which way round.
Needless to say I rewired it properly.
Most of the time I cut them off and fit an MK or
Duraplug (acutally the
same company). Then I know it's done properly.
Ah but I suspect you and I know how to correctly wire a plug, I have
I beleive I do. I've been fitting 13A plugs since before I even went to
school.
found most people who think they do, in fact
don't. Lets put it like
this whenever I get some new (to me) electrical equipment the first
thing I do is open the plug and check the wireing, and most times
re-wire it correctly :).
Well, I always open the plug an check. Maybe I have to rewire it. But I
can't open a moulded plug to check...
-tony