Stray voltage and bundling issues | Information by Electrical ...
2024年12月10日 · Hey guys, I have a stray voltage scenario that you might find interesting. I’m getting between 5V to 20V on a thermostat cable to an air handler. I removed the cable from system completely (AH, HP, and tstat) and still had that voltage. I also have same voltage on the ground of the branch circuit coming in even with the power disconnected.
Calculating house panel voltage drop from utility transformer or …
2023年10月19日 · If you consider the utility transformer fixed, then you should use 500 ft. But if the utility owns the 250 ft from the transformer to the meter, then typically the utility is regulated to provide a minimum voltage at the meter or thereabouts. In which case you are only responsible for the 250ft from the meter to the house, and can use that ...
Meter Calibration Requirements | Information by Electrical ...
2023年6月8日 · For high-voltage testers that are on hot sticks there are things like annual testing for the insulation of the hot stick and I believe there also tests for high-voltage tick tracers. It might be that companies that work with this type of equipment have succumbed to thinking there would be a benefit to requiring something similar for a 1000V/600 ...
Panel-mount voltage meter suggestion? | Information by Electrical ...
2022年9月23日 · I am looking for a product suggestion for a panel mounted voltage meter. We have an existing voltage transformer connected to the 115 kV input to our substation, which outputs 0-120V. I'm looking for meter to read this 0-120V signal and display the roughly 115kV value seen by the voltage transformer. Technically, the voltage transformer is only ...
Voltage Drop at outlets on a Custom Residential Home
2019年4月29日 · I have a customer (homeowner) that is testing the outlets in their house with a meter from Extech (CT70) for voltage drops. This meter is showing many outlets over the 5% threshold. The electrician who wired this house for me has wired 10+ homes over the years. They used 12 gauge wire in 20 amp circuits and 14 gauge wire in 15 amp circuits.
Disconnect before meter | Information by Electrical Professionals …
2011年12月12日 · Our POCO specs state - switch fuse meter but they will allow a non fused switch if the available fault current is less than the AIC of the switch, 10,000 amps typically. The bonus is we have had to use the meter disconnect many times to work on the main disconnect, some of ours overheat due to motor loads, many amps, running 24x7X months.
1000 volts per meter in surge protection device
2018年11月30日 · Searching the Internet for a value for the voltage drop per meter along the arc of a lighting strike I did not find the 1000 V value. I did find some in the several thousand to 5000 V range. So 1000 V is not a bad figure to use for the purposes of the discussion. A lighting arc as a voltage source will have a very low internal impedance.
Methods for testing voltage drop | Information by Electrical ...
2007年5月23日 · The current drawn by the motor depends upon the applied voltage and the mechanical load. For any given mechanical load, there will be an optimal voltage to run the motor. At higher or lower voltage, the motor will draw more current. Additionally, if the supply voltage gets too low, the motor may stall, drawing still more current.
The importance of selecting high- vs low-impedance multimeters
2024年3月28日 · Better for Low Voltage Measurements: The lower current draw helps to minimize voltage drops within the meter, leading to more accurate readings in low voltage circuits. Can "Load" Circuits: The current drawn by the meter can be used to test how a circuit behaves under load. This can be helpful for troubleshooting purposes.
Stray Voltage on Utility Gas pipe | Information by Electrical ...
2011年6月13日 · Stray voltage may be an incorrect assumption. Is the "shock' being conducted from the street side of the meter connection or from the house side of the meter connection? If it is measureable, what is the actual reading? More detail in regards as to what is actually occuring will help to determine what kind of event is actually creating this ...