Tim W wrote:

The disadvantage with having it at the house end is that when your angle
grinder trips the RCD, you're possibly left in the dark holding it.

Switching my welder on occasionally trips the MCB on my shed socket
circuit. I didn't own a welder when I designed the shed supply, but I'm
very glad I used separate circuits with all protection (except for the
cable itself) locally.

Pete

Andy Dingley wrote:

Use the right glands. Ideally buy an armoured cable cutter (like a
pipe cutter) as it's a fiddly job, otherwise let the sparky do it or
do it with a hacksaw, but carefully.

?

I've only done a couple of cables, but simply used a pair of sidecutters
on the armour wires with no difficulty in cutting or in fitting glands.

Pete

Pete Verdon d
wibbled on Tuesday 15 December 2009 02:47

Tim W wrote:

The disadvantage with having it at the house end is that when your angle
grinder trips the RCD, you're possibly left in the dark holding it.

Switching my welder on occasionally trips the MCB on my shed socket
circuit. I didn't own a welder when I designed the shed supply, but I'm
very glad I used separate circuits with all protection (except for the
cable itself) locally.

Pete

In which case, it's also worth designing the system to accept a type C
breaker (slightly lower L-E loop impedance required). That would help.

--
Tim Watts

This space intentionally left blank...

On 15 Dec, 02:57, Pete Verdon
d wrote:

I've only done a couple of cables, but simply used a pair of sidecutters
on the armour wires with no difficulty in cutting or in fitting glands.

Easy enough to cut, but to get access for sidecutters in there you
have to splay the wires open a bit. So long as you're careful and neat
here it's OK, but if you bend them every which way it's hard to smooth
them out to get the gland back together over them.

DIY one-off, just take your time. Commercial job and the wages clock
is runnning.

On Dec 14, 11:13*am, "Peter Crosland" wrote:
"NT" wrote in message

...
On Dec 13, 9:00 pm, The Natural Philosopher
wrote:



R Gower wrote:
"mark" wrote in message
...
My shed, when completed will be about 20m from the house.

I intend to have a small consumer unit in it, with one thingy for the
light and the other for a double socket.

It will be wired up by a sparky, not me.

I need to get the cable in the ground soon as I'm in the process of
laying
a patio.

What size of armoured cable do I need?

Thanks

mark

The electrician will tell you.

ring is rated at 30A, lighting at 6, so 36A needed. Put in the fattest
you can afford. Cable cost is low, digging is not. I'd go for a 60A with
60A RCD on its far end to power the consumer unit.
Stick a few cat5es in there too, and maybe a hose or rigid waste pipe
as well to enable future cable to be added. Cost peanuts, and you'll
kick yourself later if you dont.

Apart from being against the regulations putting signal cables and mains in
the same duct is bad practice.

Peter Crosland


They wouldnt be in the same duct


NT

On Dec 14, 1:05*pm, "mark" wrote:
"NT" wrote in message

...
On Dec 13, 9:00 pm, The Natural Philosopher
wrote:



R Gower wrote:
"mark" wrote in message
...
My shed, when completed will be about 20m from the house.

I intend to have a small consumer unit in it, with one thingy for the
light and the other for a double socket.

It will be wired up by a sparky, not me.

I need to get the cable in the ground soon as I'm in the process of
laying
a patio.

What size of armoured cable do I need?

Thanks

mark

The electrician will tell you.

ring is rated at 30A, lighting at 6, so 36A needed. Put in the fattest
you can afford. Cable cost is low, digging is not. I'd go for a 60A with
60A RCD on its far end to power the consumer unit.

Stick a few cat5es in there too, and maybe a hose or rigid waste pipe
as well to enable future cable to be added. Cost peanuts, and you'll
kick yourself later if you dont.



Cat5e? *This is for a shed! I'm just looking for an alternative to an
extension lead.

mark

So many have said much the same, but give it a few years and often
one's wishes expand. Cat5e can be used for a wide range of apps, not
just computer networking. Sticking some in the same trench only costs
a couple of peanuts, no need to terminate it.


NT

Tim W wrote:
Pete Verdon wibbled on Tuesday 15 December 2009 02:47

Switching my welder on occasionally trips the MCB on my shed socket
circuit. I didn't own a welder when I designed the shed supply, but I'm
very glad I used separate circuits with all protection (except for the
cable itself) locally.

In which case, it's also worth designing the system to accept a type C
breaker (slightly lower L-E loop impedance required). That would help.

True - it's a standard small CU so I could easily replace the MCB with a
type C one. But trips are rare enough that I don't think I'll bother.
Thanks for the idea though - hadn't occurred to me for some reason.

Pete