ponytug
Super Member
I am not an electrician, and this is not electrical advice!
To answer your question, here is an image for L14-30;
https://knoppix.net/store/Cllena-Ne...et-Receptacle-Socket-With-C_184635853241.html
One general point, and a question upfront;
If it were me, I would check what voltages your generator is putting out unloaded at the generator, then when you have loaded it up close to 6500W. I would also check the frequency. Ideally, you get something like 244V / 61Hz unloaded and 240V / 60Hz loaded. If not, adjust the generator. How close you can get will depend a great deal on the design of your generator. If it were me, I would focus on having the unloaded as close to 240V as possible, while keeping it from dropping much below 238V loaded. I would target 60Hz with about half your load on. (On one of my generators, I ended up on a long excursion of repair before I found a minor issue with the engine that was totally messing up the electrical performance.)
If that passes, I would really want to test two outlets with the microwave running and not running in my opinion. One, the circuit the microwave is on, and second an out let running in the other phase, both hot to neutral, and hot to hot.
Hot to Hot will tell you how close to 240V your generator is delivering at the outlets with no load and under load. Checking hot to neutral on the two 120 phases under load and no load may identify other issues like neutral imbalance issues.
I would always be open to the extension cord having less than ideal connections, and I would be open to any home having neutral or grounding issues, either systematically or at an outlet, or at the transfer switch.
You might find a pair of "Kill-A-Watt" type meters useful for measuring a couple of outlets.
Be careful! These are all high voltage / high power / potentially lethal measurements.
All the best,
Peter
To answer your question, here is an image for L14-30;
https://knoppix.net/store/Cllena-Ne...et-Receptacle-Socket-With-C_184635853241.html
One general point, and a question upfront;
- some microwaves are really intolerant of line frequencies other than 60Hz. I happen to own one, a great little Panasonic, and its' behavior got much better when I did some very minor tweaks to my generator to deliver 60Hz when under the load of the microwave.
- second, how is this generator wired into your house? Transfer switch? Dryer plug?
If it were me, I would check what voltages your generator is putting out unloaded at the generator, then when you have loaded it up close to 6500W. I would also check the frequency. Ideally, you get something like 244V / 61Hz unloaded and 240V / 60Hz loaded. If not, adjust the generator. How close you can get will depend a great deal on the design of your generator. If it were me, I would focus on having the unloaded as close to 240V as possible, while keeping it from dropping much below 238V loaded. I would target 60Hz with about half your load on. (On one of my generators, I ended up on a long excursion of repair before I found a minor issue with the engine that was totally messing up the electrical performance.)
If that passes, I would really want to test two outlets with the microwave running and not running in my opinion. One, the circuit the microwave is on, and second an out let running in the other phase, both hot to neutral, and hot to hot.
Hot to Hot will tell you how close to 240V your generator is delivering at the outlets with no load and under load. Checking hot to neutral on the two 120 phases under load and no load may identify other issues like neutral imbalance issues.
I would always be open to the extension cord having less than ideal connections, and I would be open to any home having neutral or grounding issues, either systematically or at an outlet, or at the transfer switch.
You might find a pair of "Kill-A-Watt" type meters useful for measuring a couple of outlets.
Be careful! These are all high voltage / high power / potentially lethal measurements.
All the best,
Peter
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