what would you say,Ze 14ohms

jeffelectric · May 11, 2013

That's a small bit of 40 years of electrical diy

Plonker 3 · May 11, 2013

How have you obtained a Ze as there doesn't even appear to a main earth present

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How have you obtained a Ze as there doesn't even appear to a main earth present

Guest55 · May 11, 2013

Dillb said:
How have you obtained a Ze as there doesn't even appear to a main earth present

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How have you obtained a Ze as there doesn't even appear to a main earth present

there is , its just not green / yellow.
;-)

Plonker 3 · May 11, 2013

Meh weekends are for drinking :54:, shouldnt mix that with work really

trebor · May 11, 2013

Judging by the voltage operated trip I would say its TT so 14 ohms is pretty damn good, reccommend upgrading to split load boards with RCD`S as voltage trips are obsolete and pretty unreliable

jeffelectric · May 11, 2013

My first thought was tt, there is a small backend wire going from the earth bar in fuse box to the back of the voltage switch .I asked the owner twice if there was a rod.

trebor · May 11, 2013

it is tt then, there may not be an electrode , at this age the wire may go to a water pipe for example which would explain the low reading , 14 ohms is very low for an electrode unles its in waterlogged ground

jeffelectric · May 11, 2013

Ty Trebor, will go back with fresh eyes.there is a board thru on other side of the wall.1 rcd about ten circuit.and 2.5mm t&e feeding another 3 way board in conservatory, underfloorheating ,rfc& lights. Anyway they are currently using a lot of extension leads . 8.5kw shower on 6mm t&e 32breaker.

Engineer54 · May 12, 2013

trebor said:
it is tt then, there may not be an electrode , at this age the wire may go to a water pipe for example which would explain the low reading , 14 ohms is very low for an electrode unles its in waterlogged ground

No it's not, ...not if you install a TT system properly!!

trev · May 12, 2013

trebor said:
it is tt then, there may not be an electrode , at this age the wire may go to a water pipe for example which would explain the low reading , 14 ohms is very low for an electrode unles its in waterlogged ground

What would you say to a reading of 0.29 ohms on a TT then? If you'd said it's not a bad reading I'd have agreed.

MDJ · May 12, 2013

Last couple of TTs I have done have been 3 ohms or below actually, I did **** on the rod though :smartass2: as for the pictures!!! Appalling

Guest55 · May 12, 2013

MDJ said:
I did **** on the rod though :smartass2:

wouldnt it be funny if a lightning strike down the road sent an arc back up your pee lol.

telectrix · May 12, 2013

well, he'd not need to shake it when he finished.

Stroppy · May 12, 2013

No, he'd need a sniffer dog to help go and find it!

long512 · May 12, 2013

is it in a rural location?
a lot of the older dwellings up here have a tt system to the nearest overhead pole, an earth spike/rod at the pole and swa to the building using the armour to supply the earth from the rod.