Hi Guys, Just a quick question regarding the earth clamp on a Domestic TNS system. The property we are rewiring at the moment has a TNS supply and the earthing clamp on the paper lead supply cable has rotted and is unusable. I spoke to DNO (Northern power grid) and asked if they could renew it for us. The call centre said no do it yourself or pay £160+ to have it converted to PME. I thought that if their equipment was faulty they were responsible for it and had to fix it. I know some sparks just stick a pipe bonding clamp round the cable and use that? I don't fancy doing anything with the cable because it looks knackered. Is a bonding clamp acceptable as long as Ze is correct?
£160 for PME isn't to bad if you can convince the client.
P
Plonker 3
No not at all, it is th DNO responsibility to maintain their equipment.
Take a Ze reading which you wont get, phone them up and tell them that you are unable to obtain it. Also tell them a elderly relative lives there and has essential medical equipment on site that requires a 24 hour supply.
That should get them moving a little quicker.
Take a Ze reading which you wont get, phone them up and tell them that you are unable to obtain it. Also tell them a elderly relative lives there and has essential medical equipment on site that requires a 24 hour supply.
That should get them moving a little quicker.
P
Plonker 3
or get DNO to maintain their equipment free of charge, no brainer to me.
G
GLENNSPARK
go back and tell the bint on the end of the phone its distributers facility earthing....and so they have a duty of care to maintain it...
go tell them that....
sick of hearing about this all the time...about DNOs shirking their resposibilities
Gawd, please don't, those old lead and paper cables are delicate and you're likely to end up causing an internal cable fault if you just use a pipe clamp with a screw tightner. You get a special constant pressure spring type clamp for lead cables, I'd try your local wholesalers for one.
Z
Zebra Stripe
Its a bit of a grey area.....they will/may say there resposibility ends at the sheath...yours is the earthing conductor and its connection to the sheath.....however, there's not a chance I would put my life at stake to connect to the cable sheath mentioned in the OP
E
Engineer54
Contact the DNO Area Engineer and explain the situation, reminding him that they have a duty of care to maintain their equipment to a recognised safe standard!!
Not that i'd ever recommend doing so, especially if you feel that you are not confident in doing so... But if you were to replace the earth clamp yourself, then you're only real option is to use a constant pressure spring clamp, that will not cause any detrimental affect to PILC cable. Hepworth earthing clamps require a special tool that is doubtful you'd ever use again...
Not that i'd ever recommend doing so, especially if you feel that you are not confident in doing so... But if you were to replace the earth clamp yourself, then you're only real option is to use a constant pressure spring clamp, that will not cause any detrimental affect to PILC cable. Hepworth earthing clamps require a special tool that is doubtful you'd ever use again...
G
GLENNSPARK
well...you do right getting the DNO to come out early and sort their equipment (including earthing arrangements) first...as it can take them upto 6 weeks to turn up...
E
Engineer54
Not so, ...If it's a DNO supplied earthing point, then they have a duty to maintain that earthing point. If that means converting to a PME connection from a TN-S connection, then so be it, they have maintained th provided earthing point, and fulfilled their duty of care!!
E
Engineer54
Why would you pay, it's their problem not yours, or your clients!! Just insist on talking to the Area Engineer. Don't whatever you do, waste your time talking to the office telephone girl!!
G
GLENNSPARK
look, you seem a really nice person...but let me just give you a few pointers here will you:
first of all....its not a `free repair` they will be carrying out...its a neccesary repair to their equipment...which they have a duty of care to maintain
secondly...dont go back to them with the idea that its your responsibility...you have made them aware of the situation...thats it...now its for them to see to it...and dont be told otherwise....you have to represent now for the customer...and believe you me when you have saved them a whole load of cash you will be popular...
just out of interest...whats the cutout here?...
cast iron by any chance?...fused neutral by any chance?
G
GLENNSPARK
oK...
well as eng & I have said....
dont you be pushed about by these turnips...you get onto the area engineer...and if they say there isn`t one...then you know thats a lie as well...
dont get into long drawn out conversations with telegirl...as she will know precisely jackshyte about what your on about....
stand your ground, be firm and you will get a result...
G
GLENNSPARK
your welcome..
and P.S. dont forget theres a thanks button for posts that have been useful...lol..
Last edited by a moderator:
K
Knobhead
Test the sheath. If OK fit a constant force spring and braid.
Saves all the earache.
Yes it is the DNO’s responsibility to maintain their equipment, but there’s times when you just give up with them. If you fit a constant force spring follow the instructions about doubling the braid back under the spring. Protect it afterwards with self amalgamating tape.
Use a bit of care and there’s no problem with PILC so long as they haven’t been stressed. I’ve reused PILC from the 1930’s. Rerouted in to new switchgear, they gave IR readings I would expect from a modern cable of equivalent size. You’re not going to be moving the cable.
If you decide to phone the DNO, PM your home address. I’ll send you a pack of anti depressants. You’ll need them!
Saves all the earache.
Yes it is the DNO’s responsibility to maintain their equipment, but there’s times when you just give up with them. If you fit a constant force spring follow the instructions about doubling the braid back under the spring. Protect it afterwards with self amalgamating tape.
Use a bit of care and there’s no problem with PILC so long as they haven’t been stressed. I’ve reused PILC from the 1930’s. Rerouted in to new switchgear, they gave IR readings I would expect from a modern cable of equivalent size. You’re not going to be moving the cable.
If you decide to phone the DNO, PM your home address. I’ll send you a pack of anti depressants. You’ll need them!
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