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I need a wiring diagram for a Square D 30T3H transformer. None of the lugs are identified in the transformer.

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  • Paul Glasnapp Nov 11, 2010

    I was able to figure out the necessary wiring and have solved my problem. Thank-you.

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Posted on Jan 02, 2017

SOURCE: need wiring diagram for transformer and themostat

http://www.nordyne.com/Literature/7083400.pdf
There is a manual it has a diagram inside. http://www.nordyne.com/Literature/708340b.pdf

That's all the info i could find mentioned at all on the net, I did exhaustive searching....

Posted on May 15, 2010

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1 Answer

Lotos plasmacutter


Depending where that transformer connected, it could merely be a 24 volt contral transformer- especially if the cooling fan has only one pair of wires coming from it, It has several boards, and those are not intended for field repair, but knowing where int he circuit that transformer is will make it a lit easier to identify. If it has a tag number that might cross to an original vendor part.

If yours is the LT5000, they have apparently had some problems and do have some literature for download
http://www.uwelding.com/page/page/5746303.htm

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I have a Square D Main Breaker Q2M-2150-MT that main lugs for incoming power has corrosion. I was able to remove 2 of 3 lugs, clean and apply nolox. 3rd. lug I cannot get loose. I tried PB Blaster and...


Put cheater bar on lug tool.
Maybe that's bit crude for delicate circuit breaker, so you should place lug tool correctly and brace breaker against box using carefully cut wood blocks and boards.

Real concern is that rust indicates condensation, which indicates high heat and maybe undersized breaker and wire. Or bad breaker.

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What is the second smaller lug for on the service lugs next to the nuetral in a 200 amp square d homeliness panel


This is a sub-feed lug, should you ever decide to add a sub-panel in your house. So when landing your feed wires to this panel, use the larger lug. Good Luck, and feel free to ask me anymore question's that you may. - Jim

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Turns on but doesn't heat only a year old LG LRM1260SW 1200 Watts Microwave Oven


I have had the LG model lrm1260sw microwave for 3 years. Recently it quit heating. I found the problem was the soldered grounding lug connection on the power transformer had lost circuit continuity and failed. One of the secondary coils on the power transformer, red wire / bare copper wire, is connected to ground / chassis. I cleaned the lug connection and added a length of wire twisted together with the bare copper coil wire and soldered to the grounding lug. I then grounded the extra added length of wire to another chassis ground point. Make sure the transformer to chassis mounting screws are tight also. Now the microwave oven works like new again.

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Battery died in a 85 Dodge power ram 4x4, got a new battery, now none of the lights work. Checked fuses, bulbs. Thinking it might be a short some where. Need diagram to trace wires.


YOU have either left a wire off the battery lug or a wire of the earth lug as the Red wires goes to starter motor and alternator,and elect like fues box etc and the BLACK wires goes to earth on the Engine bolt and on the body under the bonnet as the engine and trans is on rubber mounts so the body must have a earth wire also,.,.,.,.,.Another way put a jump lead from black term on battery to any where on the body/fender /bonnetany good earth then turn on the lights,
Let me know how you get on , Ron

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Schematic diagram Rudd silouette II a/c gas furnace needed


There should be a small set of screw lugs on the electronic board in the furnace. Look for a red wire that comes out of the transformer and follow it to find where the 24V connections are.

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I just changed my ford laser car 1988 model starter motor


plug the lug wire (Bullet connector into the starter (Bullet connector) from relay and you should be set. the square thing is the starter relay and wehn you turn the key to start mode it powers the relay that then starts the motor. this is a safety feature so the starter don't get stuck trying to start the car all the time. If you need help post to this replay and if helpful please rate this answer.

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The ground bar is tied directly to the box and the neutral bar is insulated from the box.

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What is a wire lug in my AC unit?


A lug is defined as a screw terminal made to accept one or more wires. Lugs as such are found in Circuit Breaker boxes (and on the circuit breakers themselves) Electrical junction boxes, Contactor relays such as found in Central Air units, those all being fairly large. There are also small lugs as would be associated with small wires such as thermostat wiring. Terminal diagrams for user-made connections are always provided with the unit being connected be it thermostat or HVAC unit. The thermostat comes with written documentation including diagrams, HVAC units typically have a diagram glued to the inside of the access panel.

Electricity can be your friend but can also kill you. Disconnect the power before altering or making any connections. If you don't know what you are doing, don't become a statistic, get help.

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