5
votes
Junction box for furnace fuse reads hot with NCVT, but the furnace operates normally. Is this dangerous or incorrect?
It's very common for people to wire metal boxes like plastic ones, ignoring the box altogether and wiring grounds "thru" or not at all. In that case, the metal box would not be grounded, ...
2
votes
Accepted
Junction box for furnace fuse reads hot with NCVT, but the furnace operates normally. Is this dangerous or incorrect?
The NCVT could detect a hot wire even up to 1 inch far away.
So, to be sure use Multimeter, since NCVT could be misleading.
Here is a simple test/proof.
Just wave it in front of wall socket without ...
- 2,041
2
votes
Help with installing Google Nest thermostat
Thermostat wire colors are not standardized. Any installer can use any color they want for any wire.
However, it's obvious that the designers of furnaces were talking to the makers of thermostat ...
1
vote
Advice on how to wire a 4 wire RGWY wifi thermostat to an old hvac with no c wire?
The top picture (with the timer) has noting to do with your HVAC.
It is a airflow (ventilation) controller for your home, not for heating or cooling.
On the new thermostat (model unknown) the ...
- 2,041
1
vote
How to estimate and compare operating costs of gas vs electric furnace?
Heat pumps usually supply air conditioning too so they would be part of the equation. The fact that your neighbors all have converted to a gas furnace should tell you something, maybe that gas is the ...
- 55.4k
1
vote
Accepted
Where do I connect my common wire (C wire) for smart thermostat?
You need to be tapping C from your air handler
The Ecobee 3 is like many other smart thermostats in that in a two-transformer system, it assumes that the main 24VAC transformer in the system is at the ...
- 73.2k
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