Need Some Advice / Guidance

[MJPD29]

right had an hour to spare

tested from the earth point in the isolator (spot welder end) to armoured sheath and got continuity

other end tested from earth point on the fused supply to the armoured sheath and got continuity

now tested from earth point in the fused supply to the met and got continuity

my question

from the met to the earth point in the isolator (spot welder side) via a fly lead what resistance roughly if any am i looking at

Your looking for a low resistance, if you have a multifunction tester I'd advise you carry out a Zs as well

 

[Corbs]

all depends on the csa of the cable or the armour and it's length. figures can be obtained in the osg.

ta will try and find the table

 

[Corbs]

Your looking for a low resistance, if you have a multifunction tester I'd advise you carry out a Zs as well

what sub 5 ohns ? and dont have a mft (not a sparky)

 

[telectrix]

what are you measuring? a core conductor or armour?

 

[Corbs]

what are you measuring? a core conductor or armour?

earth path eg from the isolator by the appliance to the met

as the testers say theres non / not upto standard

 

[telectrix]

as i said, the resistance will depend on what you are measuring. what size MCB is feeding the circuit? e.g. if a 32A type B, then i'd expect the resistance to be less than 0.5 ohms.

 

[Corbs]

as i said, the resistance will depend on what you are measuring. what size MCB is feeding the circuit? e.g. if a 32A type B, then i'd expect the resistance to be less than 0.5 ohms.

no mcb but 32amp replaceable fuses (i think there type 269)

 

[telectrix]

so definitely less than 0.5 ohms, depending on the external Ze could be less. no way to determine without using test meter/s

 

[Corbs]

so definitely less than 0.5 ohms, depending on the external Ze could be less. no way to determine without using test meter/s

thats fine least i have something to go off

 

[Toneyz]

I can not see any earthing conductors at the mains intake.There is nothing wrong with using the trunking and conduit as the C.P.C. but I can't see how this is earthed back to the consumer unit.

 

[Corbs]

I can not see any earthing conductors at the mains intake.There is nothing wrong with using the trunking and conduit as the C.P.C. but I can't see how this is earthed back to the consumer unit.

this is where the stupid sparks came in

they removed a metal board which the conduit was connect to it, and shoved a plastic crappy one in but not redoing / terminating the earth so atm its not earthed as i would of thought they would have done it when they changed the consumer

 

[ipf]

this is where the stupid sparks came in

they removed a metal board which the conduit was connect to it, and shoved a plastic crappy one in but not redoing / terminating the earth so atm its not earthed as i would of thought they would have done it when they changed the consumer

Understand. But AB is saying there should still be a main earth terminal....the original metal board should have been connected to it.

 

[Corbs]

Understand. But AB is saying there should still be a main earth terminal....the original metal board should have been connected to it.

yea there is on the side of the main i guess you would call it fuse holder (main incoming supply)

tncs supply if it matters

 

[Toneyz]

yea there is on the side of the main i guess you would call it fuse holder (main incoming supply)

tncs supply if it matters

Just couldn't see it in the photo and I thought it was the case regarding a metal conduit from the old metal C.U. to the trunking being removed and replaced with flexible PVC conduit removing the earth continuity.

 

[Corbs]

Just couldn't see it in the photo and I thought it was the case regarding a metal conduit from the old metal C.U. to the trunking being removed and replaced with flexible PVC conduit removing the earth continuity.

Yep another thing for me to sort / fix

 

[Toneyz]

No this is down to the electricians who installed the C.U.

 

[Corbs]

No this is down to the electricians who installed the C.U.

Well you would think will give me a bit of ammo anyway

 

[ipf]

Well you would think will give me a bit of ammo anyway

I'd call that a BAZOOKA.......not installing a main earth

 

[Toneyz]

Have you got any photo's where the original C. U. is shown with metal conduit between?

 

[Corbs]

No sorry but it was the same connection as the sockets

Coupling and brass bush

Only know this due to the coupling still being on the end of the conduit