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Discuss To earth or not to earth in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

L

LC2

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OK. had a question yesterday about main earth regs. Please can some1 answer something for me as i am a little confused. Stacked consumer units main one and economy 7 one below it. The main one has a 16mm main earth (all ok so far) the cheap rate one has NO main earth (two storage heaters and an immersion on it, 3 circuits total) I really do not understand why this is not earthed, please someone explain (and yes i am only 4 months into my career as a sparky so very green at the moment)
 
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G

Guest123

  • Thread Starter Thread Starter
  • #2
Hey.

When you say stacked, are they one unit with over and under din-rails, or are they two seperate C.U's just one on top of the other?? Also if it is one unit is it metalclad?
 
S

Spudnik

  • Thread Starter Thread Starter
  • #3
Long and short of it is it SHOULD be earthed.

As a rule 16mm. Same as main CU.
 
L

LC2

  • Thread Starter Thread Starter
  • #4
OK its two seperate C.U s with seperate meter tails stacked one on top of the other.

Is there any reason why this was not earthed in the first place (installation is roughly 25 years old)
 
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G

Guest123

  • Thread Starter Thread Starter
  • #5
Are you sure there's definately no earth?, because there 100% should be.
 
L

LC2

  • Thread Starter Thread Starter
  • #6
yep certain of it, my partner had a look at the job B4 me and said that there was but I had a look 2day and NO EARTH.
 
S

Spudnik

  • Thread Starter Thread Starter
  • #7
yep certain of it, my partner had a look at the job B4 me and said that there was but I had a look 2day and NO EARTH.
First job tomorrow then is to get it earthed!

No idea why is wasnt tho.
 
G

Guest123

  • Thread Starter Thread Starter
  • #8
Best get one in there then!!!!! 16mm as said.
 
L

LC2

  • Thread Starter Thread Starter
  • #9
OK cool thought i must have missed something when learning all this stuff, thought maybe there was a reason why this was left like this..
 
G

Guest123

  • Thread Starter Thread Starter
  • #10
Think of it like a car without brakes!!!!!!! works absolutely fine, the minute thers a problem you'll get hurt:(
 
L

LC2

  • Thread Starter Thread Starter
  • #11
yep true enough, I just vaguely remember something about reasons for not earthing in some situations. (couldn't see that this was one of them though)
 
G

Guest123

  • Thread Starter Thread Starter
  • #12
Er no, definately not.

Some area's in hospitals aren't earthed - x-ray suites, operating theaters and the like but there are many other measures in place to compensate for this.

Cheers
 
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