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Posted By Topic: TPS under ground not in Conduit.

Tradie69
Feb 13 2018 11:17

I've always been careful to run normal TPS in conduit when running it underground. However while working with a new company I have been criticised for doing this. I've been told it is not needed and that just danger tape is necessary ( and obviously buried 500 mm down. I don't have a copy of the regs handy. Can someone shed some light on this for me. I don't totally trust my employers word.

   

pluto
Feb 13 2018 12:07

Direct buried TPS also requires the use of sand or soft stone free soil for 50 mm around the cable and then some form of mechanical protection.(cat B system)
3000 clause 3.11.4.3. refers

The over all cost of conduit only (needs to be heavy duty conduit

It will caome down to the cost of HD conduit v's the use of send + mech protection. HD conduit on it's own may be the cheapest!
   

TheDon
Feb 13 2018 12:21

Standard TPS cable can not be buried direct in the ground without additional protection and warning tape doesn't meet that requirement.
You need to use a category "B" wiring system which provides additional mechanical protection ( see section 3.11.4.3 of 3000 for more details ).
You are not supposed to bury TPS in standard conduit either, ( but I suspect most people do )it can only be buried without further addtional protection if "Heavy Duty" Conduit is used.
Lately heavy duty conduit has become more available as it is required for some Solar installations , but most of the conduit the wholesalers have in stock is normally medium duty.


   

Tradie69
Feb 13 2018 12:42

Thankyou for your help. Just as I thought. I'm expected to take short cuts for this particular employer often. He does not like being Challenged on regulations. So not sure what to do really.

   

TheDon
Feb 13 2018 13:34

Suggest you politely suggest he reads the section on Category B systems and explain the way that you read it is that your not permitted to bury it direct and that you won't do it that way if your the one signing off the COC
   

AngryClient
Feb 13 2018 17:43

I'll have a chat with 'em
   

daniel2
Feb 13 2018 22:13

WTF?
   

BrianW
Feb 14 2018 09:27

You’re the one with your name on the CoC, and the one EWRB will come after if it goes pear shaped, so if the boss is a cheap arse, and doesn’t like being challenged on the regs, go work for someone else. It’s your career on the line, not his.
   

SafeSparky
Mar 06 2018 00:14

Tradie69 I have worked for an employer like yours, who likes to do things as cheap as possible. The fact that you're on this forum shows that you care enough about how you do things, that you will consantly stressed by the shitty way he wants you to do things vs how they should actually be done. My advice - find a new job or go out on your own. It's a hard job when your standards are higher than your boss's and he will always resent you for that, which doesn't make for a happy working environment. Obviously it isn't always that easy to get a new job, and sometimes the devil you know is better (as there are plenty of short cutters out there), but if you've got the option to move on then do it. I remember telling my old boss I had found a temp site light (we did heaps of t+t for a construction company) wired with circular tps onto a 10a plug. When i told him i had immediately removed the lead from the fitting and organised a replacement hd ext lead for it he said 'i use tps for those because flex is too expensive'. I really wish the standard to get a registration was higher . . There's too many idiots with nothing to market themselves on apart from being cheap in this game. We need more policing and auditing too to stop people getting away with this stuff too. Sorry for the rant but yeah save yourself the stress man
   

SafeSparky
Mar 06 2018 00:19

If you stay working for him then just make sure you study your rules and have bulletproof explanations about why you do what you do - both for him and his customers. download 3000 onto your phone too so it's always handy and you can get to know it better