Elec mains cable - how deep?

  • Thread starter Thread starter gcltd
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gcltd

Hi, I'm digging out a trench to expose gas and elec mains for works, both I'm told run in a straight line from the meters on each side of the garage down the drive to the pavement. I've found the gas but not the elec? I've dug down around 24" and the ground is becoming hard. Should it be this far down, poss further. Thanks
 
If you are digging to lay a new cable, don't bother trying to find the old one.
 
Hi, I'm locating the old cable as its being capped off, the DNO advised on the quote where it should be with a dotted line but I feel I'm down far enough and no sign, could they be assuming it comes down in a line from the meter or would they know this 100% and I simply have to dig further? Thanks
 
A dotted line on our plans indicates an assumed route! I would suggest you talk to them tomorrow and advise them it is not there!
 
I dont know how deep they normally bury these cables... but here where our house is, running accross the front of the house there is the water mains, gas main, cable tv ducts, BT telephone ducts.

GAS and electric are on the same side of the garage so probably run parallel pretty much.. watermain is about 28" deep from putting arm down the hole to turn off the main stopcock outside.

So if watermain is 28" deep, and Cable and BT ducts are about 20" from what ive seen inside their pits outside the house before.

So Gas and Electric could be deeper than 28"? which means you may not have dug deep enough yet.

But easier way as said is to use a locating device, and double check with your DNO... ground hardness isnt really an indication as over time the soil lower down will become harder naturally anyway and a lot of the time they use mechanical digger machines to dig which dont really pose a problem in terms of ground hardness.
 
Dowsing. How does that work then? Is it not well-debunked pseduo-science and woo-woo?
 
Dowsing. How does that work then? Is it not well-debunked pseduo-science and woo-woo?
No, but it works much better with a Russ Andrews dowsing rod made from 99.9999999999999999999999% pure rhodium, lapis lazuli and, most importantly, with handles made from fossilised Mesozoic era wood, as that became molecularly stable before there was electricity, and so will always react when placed in an electrical field.
 
Dowsing. How does that work then? Is it not well-debunked pseduo-science and woo-woo?
There are people who do have a remarkable and un-explained ability to detect water under ground. Maybe a survival tool that is part of the instinctive behaviour that mankind used to have to use to survive.
 
Given my innate cynicism, I'm almost ashamed to admit that I can detect (or perhaps I should say "have detected") undergound services by dowsing, using a couple of lengths of welding rod with a 90degree bend at the end.
I used to work as a college technician, and a few of us tried to find a supply cable running under a field at the back of the college. Some got a response from the dowsing rods, some didn't. Later we tried the same with looking for the water supply and main drain. Agin some could, some couldn't, but not the same people. I was the only one who could detect all three, which amazed me. :shock:
Before this test I was absolutely convinced that dowsing was superstitious mumbo-jumbo, but I'm now convinced it works. I suspect the reliability might be about the same as that of a neon screwdriver though...
 
Before this test I was absolutely convinced that dowsing was superstitious mumbo-jumbo, but I'm now convinced it works.
Fascinating. The problem with all things like this is that, if you're right, we would obviously need to re-write a good few of the Laws of physics (or maybe physiology)!
I suspect the reliability might be about the same as that of a neon screwdriver though...
Hmmm. Although the screwdrivers are not reliable enough to be 'safe', that is actually a very high level of reliability for something as 'dubious' as dowsing.

Kind Regards, John
 
Given my innate cynicism, I'm almost ashamed to admit that I can detect (or perhaps I should say "have detected") undergound services by dowsing, using a couple of lengths of welding rod with a 90degree bend at the end.
I used to work as a college technician, and a few of us tried to find a supply cable running under a field at the back of the college. Some got a response from the dowsing rods, some didn't. Later we tried the same with looking for the water supply and main drain. Agin some could, some couldn't, but not the same people. I was the only one who could detect all three, which amazed me. :shock:
Before this test I was absolutely convinced that dowsing was superstitious mumbo-jumbo, but I'm now convinced it works. I suspect the reliability might be about the same as that of a neon screwdriver though...

I have experience of this as well, used two bits of bent wire in biro tubes (to try to eliminate as much as possible of the human interaction with the wire - something about nerves in the back sensing magnetic field variations. As an Engineer it is hard to accept but that doesn't mean it is not possible.
 

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