Installing 3 Phase Socket

[aaron-lee]

Hi all can you gland armoured cable into a 400v wall socket? This is not my usual line of work and I am doing it for an NVQ assesment which requires me to install and test a 3 phase circuit using conduit and armoured cable.

I am going to run singles from the board in dado trunking, come out of the top with conduit into an isolator and drop down below the dado to a wall socket in armoured.

I had a look in the wholesalers and the socket looks like it would require a 25-32mm gland and im pretty sure 4 core 2.5 is only a 20mm gland?

Cheers Aaron

 

[Sidewinder]

25-20, or 32-20 reducing bush or 32-25-20 if necessary?

 

[aaron-lee]

Spot on, wasn't aware these were available. Cheers!

 

[Sidewinder]

Carry em on me van mate also 3/4"M>20mmF, 3/4"F>20mmM, same with 25mm & 1" could be well lost without them!

 

[SLIPSHOD & SLAPDASH]

If the socket has a threaded entry then do as sidey above mentioned. If its a knockout so you need the gland and lockring i prefer to fit a coupling and gland off into that so it gives you more room in the socket. If its a plastic commando type socket have you thought how you will earth it ?

 

[batty]

If you are not using armouring you could use a nylon gland they seem to compress down well.

 

[Sidewinder]

If the socket has a threaded entry then do as sidey above mentioned. If its a knockout so you need the gland and lockring i prefer to fit a coupling and gland off into that so it gives you more room in the socket. If its a plastic commando type socket have you thought how you will earth it ?

Can I, can I?

Please Slips, please...

 

[SLIPSHOD & SLAPDASH]

Can I, can I?Please Slips, please...

10 min, then you can

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I have to do a job like this next week for a cutting machine. You can do it for me if you want.

 

[Sidewinder]

Machines is my bag mate, like Canoey, I MUCH prefer this stuff, machinery, Ind then Comm, then IF I HAVE to Dom!

Even Mech stuff before Domestic!

 

[Andy™]

If its a plastic commando type socket have you thought how you will earth it ?

armour may not need earthed at the socket. if the armour is already earthed at the start, and has a core used as an earth to the socket, then it doesnt need earthed at the end

 

[aaron-lee]

I was going to use a 4 pin socket carrying the earth through on the 4th core of the armoured and just earth the armoured at one end to the dado, assuming this is sufficient could i just use a nylon gland going into the socket? I havent ordered the kit yet I am just piecing a job together for an on site assessment covering all these aspects, what would you reccommend kit wise? cheers

 

[Andy™]

I was going to use a 4 pin socket carrying the earth through on the 4th core of the armoured and just earth the armoured at one end to the dado, assuming this is sufficient could i just use a nylon gland going into the socket?

no. you need to use a proper gland, otherwise there is a risk of the metallic cores damaging the inner cores through movement etc

 

[SLIPSHOD & SLAPDASH]

Do you know if its a 4 pin socket, so a neutral is required ?

 

[aaron-lee]

[quote name='Andy

 

[Sidewinder]

TP&E is fine, for example as it happens I don't have any 4P&E sockets in my workshop at all!

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Earthing?...

 

[Andy™]

is this just for you to pass, or do you actually need to socket for something?

if you could use it, probably best use TPNE. its easier to disconnect N than find one

 

[Sidewinder]

True Andy, thing is you don't really need to disconnect it either, you can leave it there and just fit a 5 pin plug.

If I was designing & wiring a new place from scratch even for TP&E I would probably fit 4p&E as that way you can always IF needed pull a 1ph supply.

 

[spinlondon]

Is this actually going to be used for anything other than your assessment?

What material are the conduit and the dado?

 

[Andy™]

True Andy, thing is you don't really need to disconnect it either, you can leave it there and just fit a 5 pin plug.If I was designing & wiring a new place from scratch even for TP&E I would probably fit 4p&E as that way you can always IF needed pull a 1ph supply.

or even TPNE-TPE adapters if using multiple equipment between location with both

 

[aaron-lee]

Its for me to pass i will be installing it then taking it out once he has left, my boss has given me the run of our stores to do what i need...

I am planning on using plastic conduit from the metal dado up to the isolator