Step-up transformer grounding Commented on: 1 year ago (January 7, 2015)

qlr1

Yes, I agree with Mr. Abernathy regarding the manufacturers instructions.

Having said that, is this a three wire single voltage on both sides?
Is this an auto-transformer...

Motor Overload Protection Commented on: 2 years ago (July 21, 2014)

CodeBrad,

I believe you were using Table 430.32(A)(1) since you mentioned 125%. Did you use nameplate ampacity?

According to 430.32(C), if the selected device calculated from that...

New Grounding Table for 2014 - Why? Commented on: 2 years ago (July 14, 2014)

Hey, rbarnett:
Check 250.4(A)(1) and (B) for ungrounded systems. The requirements of 250.4 "outlines overall performance objectives for grounding conductors as applied to both grounded and...

RV Park Commented on: 2 years ago (July 9, 2014)

What 'fix' do you mean?

Circuit loading Commented on: 2 years ago (July 9, 2014)

Use 220.14(D), Luminaires, for calculating the maximum volt-amperes if it is other than incandescent luminaire.

Formula: Single phase VA formula = V X A.
1.15A X 277V = 318.55VA....

tap conductor sizing and fusing Commented on: 2 years ago (June 24, 2014)

khoops
You can't "tap" the bus bars. You need to remove one of the single- or three-phase breakers or if it is a fuse OCPD and use that space for a feeder overcurrent device and re-feed that...

Worker Dies at Oil Sands Development After Earning Electrician License Commented on: 2 years ago (May 21, 2014)

A co-worker of one of my students in my electrical Code Class in April of this year was fatally injured in a rather bizarre accident that happened East of Dallas, TX.

He was 65 years of age...

Electrician classes in Texas or online Commented on: 2 years ago (May 21, 2014)

Where in Texas?
I recently taught 5 electricians (Nov. 2013 - March 2014) how to pass the state exam successfully. I have been teaching for 20 years. Private tutoring is the way to go if you...

Looking for Help on Webinar Talking Points Commented on: 2 years ago (March 12, 2014)

[quote=meby]We're planning a future webinar on the topic of Bonding & Grounding. Do you have any suggestions on specific topics to focus on during this presentation? What electrical...

1500 W Water Heater Commented on: 2 years ago (March 12, 2014)

Short answer is 110.3(B), that is the manufacturer's instruction(s).

Also, see 210.23(A)(2) for utilization equipment fastened in place, like your water heater is. If lighting units and...

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