Switchgear, Busways, Cable Trays, MI some pictures

[darekelec]

How about max height for OCPD? Breakers should be readily accessible and they don't seem to be when at a ceiling in the busway.

Thank you for the answer below

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[iwire]

How about max height for OCPD?

LOL

As a guy that runs service calls to these stores I do ask myself this often.

The key is it is a busway

240.24 Location in or on Premises.

(A) Accessibility. Overcurrent devices shall be readily accessible
and shall be installed so that the center of the grip
of the operating handle of the switch or circuit breaker,
when in its highest position, is not more than 2.0 m (6 ft
7 in.) above the floor or working platform, unless one of the
following applies:

(1) For busways, as provided in 368.17(C).

368.17(C) Feeder or Branch Circuits. Where a busway is used
as a feeder, devices or plug-in connections for tapping off
feeder or branch circuits from the busway shall contain the
overcurrent devices required for the protection of the feeder
or branch circuits. The plug-in device shall consist of an
externally operable circuit breaker or an externally operable
fusible switch. Where such devices are mounted out of
reach and contain disconnecting means, suitable means
such as ropes, chains, or sticks shall be provided for operating
the disconnecting means from the floor.

They own and keep hook sticks in the electrical room.

 

[iwire]

Home Depot and Lowes do the same thing, look around on the ceiling near the light fixture dept or the appliance areas.

Often the busways are supplied via contactors so they can be shut down with the lighting each night.

 

[mbrooke]

They also take the service at 13.8kv own their own high voltage service disconnect, pad mount transformer sized per the NEC, exterior mounted temp generator connections in case the locomotive sized one on site goes down.

Does the generator run all the loads, select loads or just NEC mandated life safety?

Thanks for the answers! I never knew MI was mandated in MA. Must be rather interesting to terminate to equipment.

 

[Tony S]

That is work to be proud of, I know I would be.


I would pull you up over the control wiring

 

[iwire]

Does the generator run all the loads, select loads or just NEC mandated life safety?

Not 100% of the loads but darn close to it.

 

[mbrooke]

Not 100% of the loads but darn close to it.

Nice, that sounds like a world class store. Is the pad typical than larger for what a similar store would require being sized to the NEC?

 

[peter d]

Pfft, not worthy to be called pipe work when you use pre-made elbows.

 

[Pizza]

This is insane! The foreman's brain must have look like a thousand pounds of tangled up spaghetti by the end.

I'm unfamiliar with the copper gas line running into the top of the panels.?


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[ADub]

This is insane! The foreman's brain must have look like a thousand pounds of tangled up spaghetti by the end.

I'm unfamiliar with the copper gas line running into the top of the panels.?


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That's mineral insulated cable and it's awful

 

[augie47]

Grocery Stores have changed a bit in my lifetime
I doubt I could find a piece of MI cable here

 

[iwire]

Grocery Stores have changed a bit in my lifetime
I doubt I could find a piece of MI cable here

:thumbsup:

That entire building would fit in their bakery.

My wife wont shop there because it is too big.

 

[MiElectrician]

very nice work, Why don't companies rent benders instead of buying everything prefab? Is the pipe too expensive if you mess up?

 

[iwire]

very nice work, Why don't companies rent benders instead of buying everything prefab? Is the pipe too expensive if you mess up?

The company owns a number of benders, I was not on this site during construction so I can't say why factory bends where chosen over the field made but no one but an electrician would care about it.

 

[gadfly56]

I'm curious about the MI cable. What's it for?

Whoops, I missed the second page. Never mind.

 

[mbrooke]

I'm curious about the MI cable. What's it for?

Whoops, I missed the second page. Never mind.

My understanding (I could be wrong) is that MI is capable or surviving a fire to some degree or another. I have to admit its really unique for a basic building. I've seen the single line for some large high rise buildings and even they don't use MI, which imo is one place that should mandate it.

 

[gadfly56]

My understanding (I could be wrong) is that MI is capable or surviving a fire to some degree or another. I have to admit its really unique for a basic building. I've seen the single line for some large high rise buildings and even they don't use MI, which imo is one place that should mandate it.

MI is good for at least 2 hours in a fire. It's one of the few "wiring" methods that survived the purge at UL. Fire pump installations just got a lot more expensive.

 

[K8MHZ]

:thumbsup:

That entire building would fit in their bakery.

My wife wont shop there because it is too big.

The pics remind me of a Meijer store I worked on. No MI, but the rest of the pics remind me of that job.

The store we built was a 'small format' store. 395 feet square. Some of those large grocery stores are HUGE. Our 'small' store was 3.5 acres under one roof.

Built in 10 months.

I walked so much on that job it flared up an old injury on my left leg which hurt like hell. :rant:

 

[infinity]

Some very nice professional looking work. The MI cable ruins the symmetry of the EMT.

 

[peter d]

The company owns a number of benders, I was not on this site during construction so I can't say why factory bends where chosen over the field made but no one but an electrician would care about it.

The wire still gets from point a to point b whether it travels through a factory bend or not. :thumbsup: