3-phase cooker circuit installation

[hightower]

The cooker instructions say nothing about cable sizes or anything remotely useful for installation.

 

[davesparks]

Out of interest what has made you choose PVC conduit?
Personally I wouldn’t have thought it was the best choice for the environment and would favour steel.
With the large variations in temperature in a commercial kitchen I can imagine the expansion and contraction of the conduit being a problem, plus steel gives far better mechanical protection.

 

[hightower]

Out of interest what has made you choose PVC conduit?
Personally I wouldn’t have thought it was the best choice for the environment and would favour steel.
With the large variations in temperature in a commercial kitchen I can imagine the expansion and contraction of the conduit being a problem, plus steel gives far better mechanical protection.

PVC mainly for cost. It's not a commercial kitchen (as in a deli with loads of cooking equipment on the go), it's a cooker in a commercial unit. It's a vast open space so I can't see there being much variation in temperature.

 

[telectrix]

would SWA look too out of place?

 

[davesparks]

PVC mainly for cost. It's not a commercial kitchen (as in a deli with loads of cooking equipment on the go), it's a cooker in a commercial unit. It's a vast open space so I can't see there being much variation in temperature.

Well if the important factor in the design is cheapness then why not just chuck in a bit of flex in sticky back trunking?

 

[hightower]

would SWA look too out of place?

Yeah, white walls, black SWA, wouldn't be the prettiest.

Well if the important factor in the design is cheapness then why not just chuck in a bit of flex in sticky back trunking?

Wind it in a bit mate, you asked me a question with regards to a certain issue you highlighted. I responded saying that heat fluctuation isn't going to be an issue. Tell you what mate, I'll just start lashing in 25mm armour everywhere shall I, since anybody that wants to save a quid or two must be cutting corners.

 

[gazdkw82]

I've worked in many commercial kitchen environments. Rotary isolators are always used for cookers/steamers within this environment.

 

[suffolkspark]

Id stick a 25mm or 32mm gland out the bottom of the rotary isolator if you need to keep the price down a socket arrangement being forward thinking may be nice but If its brand new cooker the likelyhood of any imminent reason to unplug itnis probably small

 

[SparkyChick]

@hightower ,

When I did my first 3 phase job, I had a chat with my wholesaler regarding sockets and isolators. They had some nice looking combined units that included mechanical interlock so they couldn't be turned on unless the socket was properly connected.

If memory serves, they worked out slightly cheaper than a separate isolator and socket, and if you felt the need to go all the way and provide RCD protection, they had add on sections to accomodate a 3 phase RCD.

Just a thought

 

[telectrix]

hightower has gone quiet. customer has just informed him that it's a gas cooker.