Cat. 5e and MC Cable in Same Conduit? Commented on: 3 days ago (October 18, 2016)

Refer to NEC Article 725, Part III, particularly Sec. 725.136(I)(1). This permits Class 2 cabling to share the same raceway as Class 1 power circuits. The Class 2 circuit is separated from the...

Refrigerator Breaker Question Commented on: 1 week ago (October 10, 2016)

If the GFCI is a receptacle located behind the refrigerator, then it does not comply with Sec. 210.8. The last sentence of the first paragraph requires the GFCI to be readily accessible. GFCI...

Arc Flash Residue Cleanup Commented on: 5 weeks ago (September 10, 2016)

You really need to ask this question of the fire pump controller manufacturer. They are the only one who can truly answer your question from the standpoint of your liability.

Besides, if...

380V Motors Working on 440V Power Supply Commented on: 7 weeks ago (August 31, 2016)

A 380V motor being operated on a 440V supply is operating 15% above it's nameplate rating [(440-380)/380 = 0.1579]. This is outside the normal operating range of the motor. Motor parameters would...

Electrical Panel Locations Commented on: 7 weeks ago (August 31, 2016)

It depends. What branch circuits are served from the panelboard?

Circuits for outlets outside the X-ray room? Perhaps another location for the panelboard would be wise.

Circuits for...

Arc Flash Requirements Commented on: 7 weeks ago (August 31, 2016)

To obtain an interpretation of NFPA 70E requirements for operating older equipment you will need to review the material in 70E and perform a hazard assessment.

Notice that I did not say arc...

Healthcare Facilities Commented on: 7 weeks ago (August 31, 2016)

The White Book is only a Recommended Practice, albeit a good start toward adhering to the best practices. I believe what the OP is asking for is NFPA 99, Healthcare Facilities Code. Codes are...

Cascading Circuit Breaker KAIC Ratings Commented on: 10 weeks ago (August 12, 2016)

While I do not totally disagree with timsdl72, after reading the original question a number of times I am not sure that a Series Rated system is what the original poster has in mind.


Chase Opening in the Bottom of a NEMA1 MSB Commented on: 10 weeks ago (August 12, 2016)

By "MSB" do you mean Main Switchboard? And would switchboard be according to the definition in Art. 100? And when you say "...metal barrier under..." do you mean the switchboard is not enclosed in...

Parking Garages Commented on: 10 weeks ago (August 12, 2016)

My first impression is to consider it a damp location, just like a covered porch. I recommend asking your AHJ with a friendly phone call.

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