3-Phase, 208V to 3-Phase, 400V Commented on: 3 weeks ago (May 1, 2017)

Check 110.3(B) Listed and Labeled Equipment.....and 450.11 Source Marking (B).
See if the manufacturer has indicated so in the instructions. Sometimes transformers cannot be back-fed.

Master Electrician Test 2014 code Commented on: 16 weeks ago (January 31, 2017)

Kgh60
Here in Texas we have PSI Services LLC who administer the state electricians exam. At one time ICC and others administered the exam here in Texas. I took the ICC electrical exam many...

Step-up transformer grounding Commented on: 2 years 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: 3 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: 3 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...

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