Glass washing machine 3 phase 63a per phase

[2wireit]

good evening,

just looked at a job where a glass washing machine is to be installed in a factory.
3 phase crabree board already there. plenty of spare ways and only load on the ccu is power and lighting and alarm system.

job request from customer, need a commando socket adjacent to drain to plug machine in.

the way i would install would be, three phase board 63a 3 phase breaker.
16mm to a 63a mem switch fused isolator next to board. from there run a 16mm 5 core armoured clipped direct around 45m to commando socket.

another electrician has quoted and subsequently come in cheaper as said 4 core 16mm.
and no mention of a 63a fused isolator?

advice chaps?

 

[telectrix]

why would you need a second fuse/breaker?

 

[2wireit]

telectrix, this is what i am asking. method of install please? if i am wrong correct me please. TIA

 

[2wireit]

Mainly do domestic / new build.

 

[Yozza19]

3 phase dB clipped swa right through to comando keep it simple

 

[The Ghost]

In your title it says 63a per phase, I thought WHAT! can't be. This is crazy even 20 odd amps per phase to just wash glasses! It's got to be cheaper to employ someone to do it at that draw surely. But then I installed one that was 17 ish amps per phase for a mobile bar that washes it's glasses at the base and the machine does a cycle for hundreds of glasses in a couple of hours so maybe not. Although the manufacturers insisted I should use 4mm² rather than the 2.5mm² my calcs suggested. So I suppose the other spark was going to run a 16mm² earth along with the four core or use the armour?

 

[2wireit]

i would run 5 core also? so why is other quote 4 core??

 

[telectrix]

63 A MCB in DB provides OCPD and isolation of circuit. Commando plug/ socket provides local isolation of appliance. K.I.S.S. as he said ^^^^^.

and as vorti says are you sure it's 63A per phase?

 

[2wireit]

voltigern, its a plastic cup washer and dryer / commercial. 63a per phase stated by machine supplier to me. not installed yet.

 

[Andy78]

i would run 5 core also? so why is other quote 4 core??

Why not 4 core ?

 

[telectrix]

i'd make sure of that rating before quoting. 63A /phase will run a machine big enough to wash the glass at |Trump Towers.

 

[2wireit]

its a huge machine apparently. and would you not need to run 5 core then? andy78?

 

[westward10]

Have you done some calculations and what is a commando socket.

 

[Andy78]

its a huge machine apparently. and would you not need to run 5 core then? andy78?

Dunno, what do your cable design calcs say about that ?

 

[westward10]

My advice, if you are asking these questions to a straight forward installation. Don't get involved.

 

[2wireit]

i would always run a separate cpc? rather than rely on the sea armour?

 

[2wireit]

i would always run a separate cpc? rather than rely on the swa armour?

 

[westward10]

How easy do you think terminating a four or five core swa cable into a 63A socket will be.

 

[2wireit]

My advice, if you are asking these questions to a straight forward installation. Don't get involved.

as stated above. not my bag. i will do it though. and i will do the job well. after advice not criticism. can i not ask advice on here? so instead of being a ----? why not advise..

 

[Strima]

How easy do you think terminating a four or five core swa cable into a 63A socket will be.

It's lots of fun, especially when I had to use 25mm due to volt drop, lots of cursing and skinned knuckles...