# Search:

Type: Posts; User: LarryFine

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1. ## Thread: Breakers warming quickly

by LarryFine
Replies
10\$\$
Views
1,279

### Remember both the bus and output connections need...

Remember both the bus and output connections need to be low-resistance.
2. ## Thread: Single phase vs 3 phase lighting circuit

by LarryFine
Replies
13\$\$
Views
289

### And that's why we use the 1.73 number.

And that's why we use the 1.73 number.

by LarryFine
Replies
1\$\$
Views
55

### Waterproofing, depending on the environment.

Waterproofing, depending on the environment.
4. ## Thread: Electronics in breakers

by LarryFine
Replies
37\$\$
Views
1,210

### Whew! Thought it was me. :roll:

Whew! Thought it was me. :roll:

by LarryFine
Replies
37\$\$
Views
1,210

:?
6. ## Thread: AFCI/GFCI Breaker Trip

by LarryFine
Replies
40\$\$
Views
702

### I use standard Wiremold boxes for switches and...

I use standard Wiremold boxes for switches and receptacles under cabinets.

Not my work, but similar (I don't use oversize plates):

23182
7. ## Thread: If a motor runs on 230V at 47A, how many amps will it draw at 208V?

by LarryFine
Replies
19\$\$
Views
372

### If it''s the number he has to work with for...

If it''s the number he has to work with for 230/240v, the corresponding number at 200/208v would be use in whatever calculations he's doing.
8. ## Thread: If a motor runs on 230V at 47A, how many amps will it draw at 208V?

by LarryFine
Replies
19\$\$
Views
372

### So my 51.97a guess was right on the money. 47 +...

So my 51.97a guess was right on the money. 47 + 4.7 = 51.7.
9. ## Thread: If a motor runs on 230V at 47A, how many amps will it draw at 208V?

by LarryFine
Replies
19\$\$
Views
372

### 47a according to the thread title.

47a according to the thread title.
10. ## Thread: shunt trip breaker wiring

by LarryFine
Replies
18\$\$
Views
533

### I believe a 480v breaker's trip coil will operate...

I believe a 480v breaker's trip coil will operate on 120 to 480 volts, expecting the trip current to be momentary.
11. ## Thread: Electronics in breakers

by LarryFine
Replies
37\$\$
Views
1,210

### Correctamundo.

Correctamundo.
12. ## Thread: Single phase vs 3 phase lighting circuit

by LarryFine
Replies
13\$\$
Views
289

### Don't forget to calculate how much power (va)...

Don't forget to calculate how much power (va) you'll be able to deliver per dollar each way, too.

1ph wiring, where 3ph is practicable, is starting to look more expensive; and redundant.
13. ## Thread: AFCI required on MWBC?

by LarryFine
Replies
214\$\$
Views
3,938

### Not as far as I can tell; as you pointed out, it...

Not as far as I can tell; as you pointed out, it says "single pole", and I don't know.
14. ## Thread: Single phase vs 3 phase lighting circuit

by LarryFine
Replies
13\$\$
Views
289

### I do that sometimes. ;) Depends on the...

I do that sometimes. ;)

Depends on the J-box, but I usually opt for 1ph runs vs 3ph runs. I wouldn't want to have to make any extra connections.

But the, you're using line-to-line...
15. ## Thread: AFCI required on MWBC?

by LarryFine
Replies
214\$\$
Views
3,938

### Any single-phase outlet an any of the above. It's...

Any single-phase outlet an any of the above. It's the outlet that triggers the requirement.
16. ## Thread: If a motor runs on 230V at 47A, how many amps will it draw at 208V?

by LarryFine
Replies
19\$\$
Views
372

### Dave, that doesn't answer the question, which is:...

Dave, that doesn't answer the question, which is: presuming why he's asking, for circuit calculations, the max current, corresponding to the 47a at 230v rating.
17. ## Thread: Single phase vs 3 phase lighting circuit

by LarryFine
Replies
13\$\$
Views
289

### So, you'd be using a delta configuration. A...

So, you'd be using a delta configuration. A little unorthodox, but not unheard of. Will require 2-pole breakers likely require multi-pole switching, too.

Lay out a sample run of each method,...

by LarryFine
Replies
214\$\$
Views
3,938

19. ## Thread: If a motor runs on 230V at 47A, how many amps will it draw at 208V?

by LarryFine
Replies
19\$\$
Views
372

### A motor draws more current at lower voltage, not...

A motor draws more current at lower voltage, not less.

I have no formula, but using the theory that a motor tends to be a constant-power load, I get 51.97a.

You can check this against a couple...
20. ## Thread: AFCI required on MWBC?

by LarryFine
Replies
214\$\$
Views
3,938

### Each circuit is ​single phase.

Each circuit is ​single phase.
21. ## Thread: Single phase vs 3 phase lighting circuit

by LarryFine
Replies
13\$\$
Views
289

### First, I'd use fewer 20a circuits. Second, you'd...

First, I'd use fewer 20a circuits. Second, you'd need 12-4 to supply three phases to a neutral. 3-conductor only gets you two circuits. You are using MC and not NM (presuming suspended ceilings),...
22. ## Thread: Maximum Number of Disconnects

by LarryFine
Replies
14\$\$
Views
347

### Gee, I wish I'd thought of that. :D

Gee, I wish I'd thought of that. :D
23. ## Thread: Coffered Ceiling Lighting

by LarryFine
Replies
9\$\$
Views
247

### It does, but if it doesn't, contact cement works...

It does, but if it doesn't, contact cement works very well. I even use it to affix wiring under cabinets.
24. ## Thread: Maximum Number of Disconnects

by LarryFine
Replies
14\$\$
Views
347

### I think it won't mass muster if your plan is to...

I think it won't mass muster if your plan is to use the seventh disconnect. Can you tap into the feeder and place a remote disconnect?

I recommend contacting your AHJ first, and discuss this.
25. ## Thread: Pole top transformer impedance

by LarryFine
Replies
20\$\$
Views
451

### 120/240v 1ph. It refers to the opposing polarity...

120/240v 1ph. It refers to the opposing polarity of the lines from the center tap as the point of reference.
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