New answers tagged subpanel
3
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1969 Square D QO Panel Busbar Rating and Information
A bunch of issues:
6 to 1 is not referring to breaker space locations. Yes, sometimes certain breaker locations have particular preferred uses. That's not what this is about. This is referring to ...
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Can this subpanel's feeder continue to be used, any improvements needed beyond what I already plan?
Because this is only a 30A circuit, you can put in a GFCI at the feed and protect everything in the barn. However, I would highly recommend using a regular breaker in the feed panel and instead using ...
5
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1969 Square D QO Panel Busbar Rating and Information
Your question implies that you suffer a common delusion that "feed breaker must match sub-panel size" - it DOES NOT.
Feed breaker must be sized to protect the wires (but the wires can be ...
- 174k
3
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Can this subpanel's feeder continue to be used, any improvements needed beyond what I already plan?
I think your plan sounds fine. You should dig down as far as practicable; Code actually requires conduit-like protection for the entire stub-up (from 24" burial depth, the curve/sweep, up to ...
4
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Accepted
How to charge an EV out of this panel?
The panel and breaker issues are covered elsewhere.
60A charge rate is absolutely bonkers, and is not even slightly any kind of "need". It's like range anxiety - people were driven crazy by ...
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What is the best way to wire for 120 volt & 240 volt remote power on a saltwater dock that is located 800 feet from the house main panel?
Starting two single phase 1HP motors will be difficult at best due to the starting current of the motors. You might want to check into a single phase VFD with 3PH 200 Volt motors. The VFDs will give ...
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4
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What is the best way to wire for 120 volt & 240 volt remote power on a saltwater dock that is located 800 feet from the house main panel?
Don't use copper wire for this. Aluminum is absolutely the right stuff for a fat/long feeder.
One of the most dangerous modern uses of electricity is at boat docks. And stuff gets damaged, so when ...
4
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What is the best way to wire for 120 volt & 240 volt remote power on a saltwater dock that is located 800 feet from the house main panel?
@Ecnerwal 's answer is excellent - 2 AWG aluminum is the way to go and meets the basic 240V 15A < 3% guideline and allows for plenty more current with a somewhat higher voltage drop. More than ...
3
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What is the best way to wire for 120 volt & 240 volt remote power on a saltwater dock that is located 800 feet from the house main panel?
4AWG copper is very expensive these days.
2-2-2-4 "Mobile home feeder" with aluminum conductors happens to be a good price point, and will also get you under 3% drop for an 800 foot run, not ...
- 174k
3
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Conduit and sub-panel for shop
First and foremost, conduit installation requires the entire conduit be built complete before any wires are pulled in. Some novices think they're supposed to lay the wires on the route then slide ...
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Conduit and sub-panel for shop
Not without a junction box and a transition to cable. The wires alone without conduit are not an acceptable wiring method in-wall or out.
They have to be in conduit (you can change type of conduit, ...
- 174k
2
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Finished Basement New Sub Panel + Hot Tub, EV Charger Load Calculation
You need to do a load calculation at each feed:
Utility feed - 200A - this includes everything in your house or connected to it that is running off of your meter. 200A is a typical feed size (...
3
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Accepted
Finished Basement New Sub Panel + Hot Tub, EV Charger Load Calculation
1.) In NEC I don't see that you need to account for the 20a bath circuit in addition to the general load calc (3 VA / sq ft) is that correct?
That's correct. For kitchen and laundry, all the 20A ...
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What size wire do I need for a 100amp underground 300 ft run?
Old question, but it deserves a proper answer...
TL;DR Aluminum 1 AWG or possibly 1/0 if you expect consistent high usage, in 1-1/2" rigid metal conduit (6" burial depth) or 1-1/2" PVC ...
5
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Accepted
MRCool 24k BTU breaker size, wire gauge and disconnect box
MCA of 22A means it will work on a 25A breaker. Or a 30A breaker. MOP means "not bigger than" 35A breaker (or fuse.) You don't NEED anything more than 25A as the first available size bigger ...
- 174k
1
vote
Accepted
Installing a sub panel in basement from main panel in garage
I'd recommend conduit and wires, not cable.
If you choose non-flexible metallic conduit, and assemble it correctly, you have your required ground without a separate grounding wire.
Given it's a garage,...
- 174k
10
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wiring a 100amp subpanel to my barn 600ft away from my 200amp service panel
The "20% per 100'" rule of thumb you found there isn't very good. It's excessive for short distances and insufficient for long distances, and this is the latter. Anyway, Voltage Drop ...
3
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wiring a 100amp subpanel to my barn 600ft away from my 200amp service panel
If you are to follow the national electric code you are only allow to have a maximum voltage drop of 5% from the service entrance to the furthest outlet/switch in your barn. 600' carrying 100 amps is ...
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Why are some of the breaker locations marked "do not use" in my subpanel?
If you buy a sub panel with however many spaces, can you always make use of every space in that sub panel, If not why not?
If you buy a 6-space subpanel like a BR612, would you say you are entitled ...
3
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Why are some of the breaker locations marked "do not use" in my subpanel?
Many possible reasons.
One is that the sub-panel may only be fed from a 120V breaker connected to one bus, and the other bus may not be powered at all. You mention "a circuit or space" not a ...
- 174k
2
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Why are some of the breaker locations marked "do not use" in my subpanel?
For a long time the NEC specified maximum 42 switches in a "lighting" panelboards. Panelboards were built and Listed compliant to the NEC. The NEC has changed, but panels are subject to the ...
- 14.8k
14
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Accepted
Using an Ohm Meter to test for bonding of a subpanel
The panel looks beautiful, except for one problem.
You are 100% correct. Because neutral and ground are bonded in the main panel (whether that is a regular big panel or a small panel/disconnect at the ...
17
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Accepted
Adding EV Charger (100A) in secondary panel (100A) fed off main (200A)
It's astounding what is possible. EV charging tech is smarter than you could imagine.
"Don't I need 100A though?"
TLDR: No. The Ford Connected Charge Station Pro can work on any breaker from ...
5
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Adding EV Charger (100A) in secondary panel (100A) fed off main (200A)
I still have checks in my checkbook, so I can write a check for any amount.
Obviously it doesn't work that way. Similarly, just because you have spaces in your subpanel doesn't mean that you can draw ...
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