11
votes
New Thermostat displaying inaccurate for outdoor temperature sensor
After inspection of the thermocouple located just below and outside the heat pump I discovered the tape used to hold the sensor to the heat pump was caked with light dirt and mud. I removed the ...
- 485
5
votes
New Sub Panel to new shop – Please check my math/ Plan
I don't see ground rods in your plan. You'll need grounding since it's a detached building.
Adding up all the loads isn't a valid load calculation. Make sure you've done one for the total house and ...
- 9,167
4
votes
New Sub Panel to new shop – Please check my math/ Plan
You need a disconnect in the new location - the main breaker on the subpanel takes care of that.
You can use a 200A panel just as easily as a 125A panel - whatever is the best deal. Often large panels ...
4
votes
How to transition between running along joists to running perpendicular
The picture provided does not need a hole in "every joist" it needed one more hole in one more joist.
The best way to treat that problem is to drill that hole, missing the one visible or ...
- 200k
3
votes
Ethernet tester says miswire
There is a potential disaster when switching from phone circuits to Ethernet. Ethernet is point to point. That indicates that it has to have a continuous wire from the switch/router to the computer, ...
- 6,899
2
votes
Replacing old dimmer with a new one
The green wire is earth ground and should be connected to the metal box. The other two do not matter it should work either way. If not just swap them.If your metal box is not grounded you can check ...
- 6,899
2
votes
How should this UL-listed boiler cutoff switch maintain Class 1 separation?
The wiring scheme is approved by UL, but using the second knockout as the photo shows is not. The sharp metal edges will cut through the thermostat wire insulation. The knockout plate should be ...
2
votes
How do I wire a new 3-Way switch with the old existing wiring (2 black & 1 Red wire)?
If wires are attached only to the brass screws on either side of the new switch, then nothing will happen. This is the expected outcome of what you did. The 3-pole switch is designed to alternate ...
- 3,710
2
votes
How do I wire up the switch for my bathroom fan?
You have two old-style switch loops here
What you see in your switch box are a pair of old-style (no neutral to be had) switch loops. You should be able to wire your spring-wound timer's brass screws ...
- 81.7k
2
votes
Accepted
Did they switch the neutral wire on accident? (1970)
It does look wrong. Is it as easy as swapping a connection? That depends whether this box is the only one wired wrong. It would be sufficient to use a multimeter to verify the black-to-ground ...
- 3,710
2
votes
Why are red & black stranded wires connected to neutral?
it was run above a ceiling and didn't have to be in conduit
It does have to be in conduit. NEC 300.3 strictly forbids installing wires willy nilly above the ceiling. The red and black wires would ...
- 3,710
1
vote
How do I wire a new 3-Way switch with the old existing wiring (2 black & 1 Red wire)?
The old switch has screws out of sight top and bottom, I believe. Two of those are the same color, like the brass screws on the new switch, and one of them is a different color, like the black on the ...
- 200k
1
vote
Need help ID’ing cloth wires
Check for continuity or voltage between the wires and ground (the box). The wire with continuity and no voltage is neutral; the wire with no continuity and 120V is hot.
- 739
1
vote
Was my inverter damaged during testing?
TL;DR The inverter may be damaged.
I agree with @dentarthurdent's answer that shorting out the battery input terminals on the inverter while connecting the battery would be quite unlikely to damage ...
- 6,372
1
vote
Was my inverter damaged during testing?
The battery short will probably have not caused damage, at least not to the inverter assuming it was powered off at the time. (I suspect the battery would have short-detection built into its BMS. You ...
- 191
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