Electrical Troubleshooting

Mineral Turpentine Oil

Is the receptacle a 110 or a 220 outlet? If it's a 110, it needs to be a 220. Are there other appliances, lights, etc. wired on the same outlet? If so, you may have to re-wire so that no other appliances, lights, etc. are wired into the same breaker. Usually the larger appliances such as air conditioners, central heat systems are wired to a separate breaker or fuse.

i believe mostly in contact points, connections

The only time a motor should go into a locked rotor condition is if the motors connected load jams causing the motor to stop turning. At this point if the motor control circuitry is sized to the motor's full load amperage, the high rise in current will trip the motor off line.

A "multimeter" to test resistances, voltages, amperages. An external "clamp" meter to measure high ac currents. A "mega" meter to test insulation.

No. Unless the LED is specifically a laser, you can not make it focus like a laser by putting it in a housing. A laser produces coherent light, which is why it acts like a beam. A normal LED is not coherent, and you can not make it so. Although you can not make a collimated incoherent light beam able to travel similar distances as a collimated laser beam, you can collimate incoherent light into a beam which would travel some distance with a small amount of divergence.

You don't. Motors have vents to dissipate heat. Although you can see the windings through these vents, don't cover them or the motor will overheat and burn up.

The wire/s probably grounded or short circuited by touching each other or metal nearby. If there is a fuse check to see if it's blown. If so replace it. If there isn't a fuse (which is usually the case) the transformer will have to be replaced by a qualified person. An in-line fuse holder with the correctly rated fuse (and a couple of spares)would be a smart and cheap addition to protect the transformer from future shorts.

You could use a transformer in theory if a 200 volt ac unit is single phase. You must mean a 220 unit. 120 uses 3 wires, hot neutral and ground. 220 has two hots a neutral and a ground. A 2 phase motor is more economical than a single phase motor. That is why all larger units are 220. I have seen people change the breaker to a 220 and use the ground as a second hot to avoid the cost of rewiring, but don;t do it. It is against building codes ,and you don't want to break the law, not to mention it is a fire hazard. Long story short, how can I use an appliance made for 220 with a 120 source, you can not. The larger unit draws more current than a 120 can supply. If you found some way to wire it the wires will heat up and if your breaker fails you have a fire. Ignorance is not covered by home owner insurance.

Under load, take your voltage meter and read from the first battery - terminal to each successive + terminal. Each increase in voltage should be the same for each battery. Anything off by more than .3 volt is starting to deteriorate and should be reconditioned.

0- ____ +6.2 -____+12.4 -____+18.6 -____+24.5-____+30.2-____+36.4
.....#1 ..............#2 .............#3 ...............#4 .............#5...............#6
Battery 4 is marginal, Battery 5 should be reconditioned.


Of course, the difference should be less for smaller voltage batteries and no more than .5 volts for 12 volt batteries. These are just numbers I have come up with empirically. Someone else may have a better reference for the allowable voltage difference between batteries in series.

Yes, the 250 volt rating refers to the insulation rating factor of the cord and the maximum amount of voltage potential that the cord can safely handle.

Phone an electrician urgently

what is the meaning of type test

The secondary side (output) of a three phase transformer develops a "separately derived system". That is why you do notsupply a neutral to a three phase transformer. It develops its own reference to ground by being bonded to the transformer casing and to a substantial earth ground, such as a ground rod. The XO tap on a transformer provides the neutral to the secondary line. It will have a double wire lug. The neutral wire going to the panel being supplied goes under one lug and the same size wire is to go to the ground lug on the transformer chassis The ground lug is also a double with the other lug to be wired to the earth ground.

The interruption capacity of a fuse is the ability of a fuse to stop the current flow on a short circuit condition. On high rupture capacity (HRC) fuses the fuse cartridge has silica sand surrounding the fuse link. When the link blows under a high current so much heat is generated that the silica sand actually turns to glass to extinguish the arc. A dual element fuse is used on motor starting circuits. Their construction inside with two current flow paths allow the high current of a motor start for a short interval of time without blowing.

The current output is governed by the load resistance of the circuit. The battery will try and supply as much current as needed up until the battery goes dead.

Yes. If you can't get to the space behind the wall, you may be able to get the extension nozzle of spray foam can behind the outlet and seal it off. Ideally in new construction you would use spray foam on all wall penetrations like where electric wires pass through studs.

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There are gaskets available at DYI stores that can be used to stop air infiltration. These gaskets are installed between the cover plate and the receptacle or wall switch. The gaskets are only needed on outside walls. On new installations use a PVC junction box that is completely sealed. There is a neoprene strip that covers the entry points where the conductors enter the box and are self sealing. On the front of the junction box there is a drywall strip that circles the front of the box. This also has a neoprene strip that seals the box when the drywall is installed up against the strip. The wall vapour barrier is also taped to this strip on the box to make a completely sealed system to prevent drafts entering through the house's outside walls.

Usually you would want to stay at least 10 feet away from power lines. Any conductive material you are working with also has to be at least 10 feet away (metal extension ladder).

1. it is use for indurstail purpose.

2. it is use in general purpose nin the home.

3.

Yes, it would appear that one side of the main is open at the fuse, breaker, drop conductors, or transformer.

Keeps the current in the conductor. Without the insulation on a conductor the current can and will leave the intended path in the electrical circuit if it comes in contact with some other conductive path if there is a difference of potential.

The frequency, or number of cycles per second is measured, then divide the speed of light in meters per second (299,792,458) by frequency to get wavelength in meters. Example: 7 Mhz = 7,000,000 hz 299792458 / 7000000 = 42.8 meters.

Turn off the power!

If you have a 200 amp main breaker, it will trip when any one of three phases exceeds 200 amps. This does not give you 600 amps total, only 200 amps total, but on each of three phases. Your three phase machinery and equipment will likely load all phases evenly, and a good electrical design will load your lights and receptacles evenly on all three phases. Doing this reduces the possibility that two phases are loaded at 100 amps, but one is loaded at 205 amps, so the main trips for example.

Yes. The panel must be grounded with its own grounding rod. The ground will not be provided with the feeders to the panel, these will only contain your phase wires and neutral. Also make sure that any subpanel installed does not have the neutral bonded to ground. This should only be done at the main panel where the electrical utility service is connected.