Bakery factory

[hhsting]

I have bakery factory and has kitchen. The kitchen has two 200 quart mixers 208V, 3 phase, 7 HP each. The panelboard feeding these mixers is in separate warehouse room and drawings show conduit from panelboard go underneath slab come up into junction box next to mixers.

I was wondering if the mixers would require disconnects per code 2014 or can it be straight hardwire without disconnect at the mixers?

 

[zbang]

I'd be surprised if they didn't require a disconnect within sight. Could change if the area is subject to wash-down or a dusty (flour) environment (maybe breaker lockout device, then).

 

[texie]

If you have provisions to lock the breaker in the open position the disconnect could be omitted. See part III of Art 422. But I would say it would be a rare owner/specifier that would be OK with this regardless of the code because it makes it difficult to service.

 

[Jraef]

422 applies to appliances, which is defined as "other than industrial", so it may depend on what TYPE of "bakery" this is. With 3 phase 7HP mixers, it's possibly going to be considered industrial.Generally if there are multiple employees involved (as opposed to a sole proprietor), OSHA requirements will prevail as well.

430.102 is what would apply in that case, and it does require a disconnect within sight of the motor.

However, one exception might apply (430.102.C.2.b) IF the disconnect is lockable and part of the controller, AND it is "In industrial installations, with written safety procedures, where conditions of maintenance and supervision ensure that only qualified persons service the equipment." That's one of those often nebulous things that an AHJ can argue with you about.

The safe bet is of course, just put in a local disconnect. If there is some other Branch Circuit Protective Device upstream anywhere (and there should be), then you can use those inexpensive rotary non-fused disconnects in plastic NEMA 4 boxes.

 

[hhsting]

422 applies to appliances, which is defined as "other than industrial", so it may depend on what TYPE of "bakery" this is. With 3 phase 7HP mixers, it's possibly going to be considered industrial.Generally if there are multiple employees involved (as opposed to a sole proprietor), OSHA requirements will prevail as well.

430.102 is what would apply in that case, and it does require a disconnect within sight of the motor.

However, one exception might apply (430.102.C.2.b) IF the disconnect is lockable and part of the controller, AND it is "In industrial installations, with written safety procedures, where conditions of maintenance and supervision ensure that only qualified persons service the equipment." That's one of those often nebulous things that an AHJ can argue with you about.

The safe bet is of course, just put in a local disconnect. If there is some other Branch Circuit Protective Device upstream anywhere (and there should be), then you can use those inexpensive rotary non-fused disconnects in plastic NEMA 4 boxes.

Occupancy type is F-1. NEC 2014 Article 422.1 says article covers appliance in any occupancy however appliance as you say is defined as other than industrial. Can this be discrapancy?

 

[GoldDigger]

Occupancy type is F-1. NEC 2014 Article 422.1 says article covers appliance in any occupancy however appliance as you say is defined as other than industrial. Can this be discrapancy?

Not a contradiction, since you can have appliances (refrigerators, microwaves, vacuum cleaners, etc. for example) that are not industrial in scale and purpose but are located within a factory occupancy.