Voltage reading on the MonsterPower Powercenter on this July 4th eve:
What is your home's voltage today (07/02/2026)?
- Thread starter ripcord
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Depends on time of day or night, as daytime can drop slightly, we used to monitor this at the large health care facility I worked at , the frequency can vary a bit to, during hot weather it was interesting when we kicked on a 4,000 ton chiller even with soft start ,it would dip some times till it recovered, one time we had a bad storm and lost all of our feeders (all 3 individual incoming),went up on gen. ,after storm passed and one feeder came back, we switched over (auto,) and manually and blew out a part of a substation across town .,well back on emergency power, made for a long night.( we have 3 Cat generators ,2600 HP each),the voltage harmonics would sometimes vary in different parts of building too. I am sure the residential community felt this because heavy loads from varying industries affect this phenomena.
Did the chiller use a vfd?
yes a lot of our equipment had variable frequency drives, as large AC fans etc ,medical equip. had line Freq. monitors also with line filters.
Could be. Low voltage = high current so it could have also been too much amperage in some circuit?
117.7 tonight on the first outlet next to the service entrance. We are at the end of the line. I’ve called before in the winter about low voltage (strip heat for homes along our road that don’t have gas) and the guy at the substation called me and started flipping switches. Sure enough, got us back go 120v.
MolaKule
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123.5V rms.
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My reading is from a Monster power surge protector and filter as well.Voltage reading on the MonsterPower Powercenter on this July 4th eve:
Mine will cut off power to our entertainment center if I hook up a conventional UPS, or portable generator to it. Neither can provide clean enough power. Only a pure sine wave is allowed through.
Input voltage to my UPS was 122 at 8:00 AM but fell to 121 by 8:20. Will check again once we exceed 90 degrees outdoors.
If you have an old 120V synchronous electric clock, it relies on the electric company for its accuracy. You should plug it in, set it accurate and compare the accuracy a week later.
The power companies adjust the hertz that keeps them accurate over a long period. Often more accurate than quartz unless you lose power. But if you lose power you can look and see how long its been off and when it shut off unless you were away from home more than XX amount of hours.
I bought this new 1/2 a lifetime ago when in Tampa in the early 2000's. The clock was made 4/1999 in the USA.
The power companies adjust the hertz that keeps them accurate over a long period. Often more accurate than quartz unless you lose power. But if you lose power you can look and see how long its been off and when it shut off unless you were away from home more than XX amount of hours.
I bought this new 1/2 a lifetime ago when in Tampa in the early 2000's. The clock was made 4/1999 in the USA.
True. It's interesting to me the long term accuracy regarding it.
122.0 steady @ 10:15AM 04 July 2026.
PSE&G North Bergen Plant.
In years gone by, touring Scouts got to throw the switch which sent the 7K to the George Washington Bridge's arc lights.
Little in the world of archetechural lighting looks as cool as the GWB at night.
PSE&G North Bergen Plant.
In years gone by, touring Scouts got to throw the switch which sent the 7K to the George Washington Bridge's arc lights.
Little in the world of archetechural lighting looks as cool as the GWB at night.
121.3
Yep I've seen that. Tree fell on the neighbors service drop. Some lights blew out, others dimmed and just about everything else that was plugged in fried.
It's 95 degrees here now and the voltage has sagged to 118. The marginal price across the PJM interconnect is $49.21 per MWh. The marginal price is expected to peak at about $250 per MWh at 5 PM. This has proven to be an interesting experiment so I will check again in a couple of hours.
Oh - the line workers at my utility went on strike at midnight so let's hope the power doesn't go out.
Down to 115.6 on the Kill-A-watt at noon today.
117v at my car according to tesla app. maybe some voltage drop through charger but it's generally quite accurate
1600 hours 4 July 2026. Outdoor 100 ambient. PJM interconnect at $372 per MWh marginal cost. Supply voltage down to 117 vs. 122 at 8 AM. It could go a bit lower over the next hour or two but I will be manning the grill and boiling corn.
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