Electrical Design Question: Client wants a range oven that power can be switched on and off to

[JohnnyPElec]

Hello everyone,
I have a small commercial client that is requested a bit of a new situation for my experience thus far. They are placing a new range oven in an open community space where they'll be live cooking shows, so it would be utilized by professionals most of the time. But the space will always be open to the larger community as well and they want to have the local ability (within the classroom and within sight) to shut off power to the range when convenient. My initial belief is that this can be done with a wall mounted enclosed circuit breaker with locking provisions.

Are there other unobtrusive options for a design request like this? Or other options that you all may have seen utilized for similar requests?

Thanks,

 

[roger]

We did this in a rehab kitchen once, the locking disconnect was located inside a cabinet for aesthetics.

 

[Krusscher]

If you can make the recept accessible maybe a cord end lockout? would probably be a pain but the cheapest option possibly, but since it's a new install I would design it with a disconnect like you said.

 

[drcampbell]

Toggle switch or key switch, and remote contactor

 

[Jraef]

Wire in a contactor to feed power to it, with a keyed selector switch to turn it on and off. You can locate the enclosed contactor anywhere that is convenient, such as next to the panelboard and the key switch can be somewhere else more accessible, ie within the classroom near the oven.

 

[LarryFine]

Limited access to the breaker?

 

[macmikeman]

First off are the oven(s) single phase or three phase to adapt to the existing voltage of the building? Most ranges sold can vary between 208 -240 volts no problems. Various manufacturer's, Eaton, GE, Seimans, etc sell 2-4 main lug (single phase) load centers both nema 1 or nema 3r. 2 full size 1" breaker slots for either a double pole plug in breaker or a quadraplex breaker depending on the manufacturer. Under a hundred bucks. You could hang it someplace within 50 ft and clear line of sight to the appliance but it needs to have the regular overcurrent device clearance called for in section 110 of the NEC.

 

[Todd0x1]

Wire in a contactor to feed power to it, with a keyed selector switch to turn it on and off. You can locate the enclosed contactor anywhere that is convenient, such as next to the panelboard and the key switch can be somewhere else more accessible, ie within the classroom near the oven.

I would do it like this except with the contactor wired through aux contact to a momentary key to turn it on and a NC pushbutton to turn it off. This way someone can use their key to turn it on, maintain posession of the key and not leave it in the switch for it to disappear, and anyone can turn it off.

 

[tom baker]

Shut trip breaker is one option. Where I worked, we had best interchangeable key cylinders, and I was able to buy switch locks that were compatible with the best keys, or there are other types of key systems with switch locks that would be compatible with a master key system.

 

[Todd0x1]

Shut trip breaker is one option. Where I worked, we had best interchangeable key cylinders, and I was able to buy switch locks that were compatible with the best keys, or there are other types of key systems with switch locks that would be compatible with a master key system.

That's a good suggestion, keyswitches that take SFIC lock cylinders arent tooo expensive, around $150. I would avoid the shunt trip breaker though and go contactor + NO momentary keyswitch + NC off pushbutton.