The first edition of the Wiring Regulations
"Fuses ... should always be enclosed in incombustible cases.
Where wires are put out of sight, as beneath flooring, they should be thoroughly protected from mechanical injury, and their position should be indicated."
On 11/05/2019 13:21, email@example.com wrote:
My house was built in 1976 with wylex rewireable fuses
in the hall, inset into the party wall.
Above the fuses is a removeable metal cover plate that
stops about half an inch above the fuses.
I noticed that above the 30 amp cooker cable was a black
'splat' and an indentation where the metal, about 2 mm thick
had been melted away.
Years later I discovered that the new kitchen that the previous
owner had fitted, had resulted in the live cable supplying the
cooker being drilled right through to fit a new wall
cupboard, and then 'repaired' with a bit of choc-block and
hidden by the new cupboard.
That must have been a big bang and anything combustible above
that 30 amp wylex fuse would/could have been ignited.
Yes well did anybody actually do that?
My fuse box when we moved in was the one that was here in 1939 and its fuses
seemed to be just bits of any old wire wound around a couple of terminals
under a lift up cover with one screw securing it shut, but the big lever had
to be off before it could be opened for safety of course. When looking at
wiring it was all rubber covered most of it had no earth, and seemed at
least upstairs to be just laid about all over the place with junction boxes
made of bakelite to spur off the sockets.
This newsgroup posting comes to you directly from...
MOST of it had no earth, Brian?
What's an earth?
The house I grew up in had a similar prewar fusebox - non of
this modern Consumer Unit nonsense - with the interlocked
switch but ours had the luxury of four removeable rewireable
fuses - just well, considering the barely accessible location
of the fusebox at the back of a cupboard.
The fuses, all wired with 5A fusewire, were fitted in both
live and netral of the two circuits. One fed the lighting
circuit and the other fed the *single* 5A 2-pin socket in the
Having a fuse in the neutral as well as the live used to be the practise
for DC circuits, was this an installation that once was a DC supply and
still using the original wiring after changeover ?
Pockets of DC mains lasted surprisingly late, Exeter had a small area which
wasn’t converted till the early 1970’s. I think Reading had some fairly
late as well.
My aunt and uncle's house (built in the 1930s, in an area that was
definitely AC then) had live and neutral fuses when they moved in in the
1980s. It caught them out when they were asked to pull the fuse for a
circuit, which promptly went dead and then vapourised the cutting edge
of the pliers when a cable was cut!
Yes - my parents house bought new in the '30s had fused neutrals too. And
was definitely AC as my father said they'd had to buy a new radio too.
I re-wired it in the 70s. And it just occurred that the wiring in this
house has now had about the same life. ;-)
*Upon the advice of my attorney, my shirt bears no message at this time
Dave Plowman firstname.lastname@example.org London SW
On Tuesday, 14 May 2019 22:56:34 UTC+1, email@example.com wrote:
By that time one wire of the supply was reliably a neutral and tied to earth at the generator.
In parts of Europe double-pole MCBs are used because their supply is reversable with neither wire reliably a neutral.
On 15/05/2019 08:11, firstname.lastname@example.org wrote:
Yes, often fed from overhead lines and neither side tied to earth.
Some of their 2-gang sockets are effectively two single gangs with one
rotated 90° clockwise and the other 90° anti-clockwise and then
connected with straight bars - meaning that the two sockets in the same
faceplate have opposite polarity!
No idea but the HMV radio that was plugged into that single
socket was AC only and dated back to 1940.
Ilford - so quite a large area - was still 200V DC when I was
at school in the late 50s (Ilford Council had been generating
600V DC for the trams, so provided homes with DC as well).
Fortunately it had been converted to 240V AC by the time I
went to live there in the mid 70s!
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