Electrical Troubleshooting

Typically a loose connection is either wires in a wire nut not making a proper connection, or a wire not tighten properly in a breaker and/or device e.g., outlet, switch, etc.

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Bus bars themselves don't usually fail. Failures normally occur at a connection point, and is usually caused by the bolt or screw becoming loose, or by corrosion. The resulting resistance causes the connection point to become hot, and eventually fail.

The most common method of detecting this condition is by infrared thermography. An infrared camera is used to find connections with elevated temperature.

Good question. There are a few simple answers. Most solders begin to become "plastic" at around 350 degrees Fahrenheit and melt at slightly higher temperatures than even that.

If you are asking about a hot water heater: If you are operating your water heating system at that temperature the water will have already boiled off and most likely the heater will either have exploded, the P/T relief valve dumped or both.

If you are asking about an electric heater, do not try to melt solder on it. The heating element is electrically "hot" and could present an extreme shock hazard.

The best way to melt solder is with with a soldering iron or some kind of torch.

Hope this helps

The circuit is wired wrong. Contact a qualified electrician to make the necessary repairs.

You don't describe the problem well enough to troubleshoot. If there is a fuse involved and it blows you would have to replace the fuse before anything should turn on. If this circuit worked at one time and all of a sudden stopped working then you may have a faulty switch or wires shorted in te switch box. If this is a new installation follow advice from redbeard.

To answer this question a supply voltage must be stated. Also the wattage of the lamps is needed.

A diode should show low resistance with the leads hooked one way and show an open with the leads reversed

Verify that the correct connections to the GFI are correct. It sounds like the ground wire is not connected.

The maximum distance of a wire drop between a service pole and service connection is undefined, as it depends on many factors not included in the question. The information needed to actually compute such a distance includes, but it is not limited to, the service volts, the service Class (60, 100, 200, 400 or more amps), and whether or not the drop involves a mid span tap -- that is, the service is actually connected not to a pole, but it is connected to secondary wires between two poles.

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A utility company will usually bring their service a maximum of 100 feet on to private property.

Quite a bit of bad stuff can occur, simultaneously, when a person is electrocuted.

The first is muscle energy depletion. When muscles are electrically stimulated they go into spasm and deplete the sugar reserves, making it impossible for the muscle to continue to function. When that occurs, it may be possible that the heart muscle can no longer pump. That's why it's important to know CPR, so that the heart muscle can receive energy in the blood that's being pumped.

Second can be bone fractures. Muscles are capable of contracting so violently that bones will sometimes fracture under the strain.

Third is electrolyte imbalance. Nerves are the communication mechanism of the body and there is a balance of electrolytes between the inside and outside of the nerves. When electrocution occurs that balance can be drastically modified, sometimes permanently.

Fourth is tissue damage. High energy electrocution can literally "cook" the tissues; muscle, bone, ligaments, nerves...

Take the oven to an appliance repair shop. It sounds like the door safety interlock has jammed the opening mechanism.

If a 200 mA power supply is used on a circuit needing 2 amp it would overload the power supply. Two amps equates to 2000 milliamps. Trying to pull 2000 milliamps from a device that is only capable of supplying 200 milliamps is not advisable. The excessive current draw would most likely burn the wires open and render the power supply useless.

Insulation resistance.

The current path in an over current fault is the path of least resistance. Older electrical systems used to use the neutral wire for this purpose. It was found that on some occasions this was not the path of least resistance. Hence the installation of a ground wire being installed in cable sets. This innovation caused the whole grounding section in electrical code books to be rewritten. Now a specific ground wire is used to bring the fault current back to the distribution panel to trip the breaker and open the faulted circuit.

Analogue sensors are usualy more accurate :P

You should always repair or replace faulty house wiring.

If the over-current protection of a breaker has stopped functioning, you run the risk of burning down your house.

If the ground-fault protection of a breaker has stopped functioning, you run the risk of accidental electrocution.

you can take a siren from a home security device, not a speaker but a siren cause a siren works of voltage and a speaker works of wattage. take a battery that is capable of working the siren then just put the the siren in series with the battery and then take the two wires and put one on the open side of the battery and the other wire on the open side of the siren. If the siren goes off there is continuity between the two wires your testing if the siren dont then there is no continuity.... good luck..

Depends on the chemistry.

A standard D cell has 1.5 VDC. Oxy Nickel Hydroxide and Lithium cells have a slightly higher voltage of 1.7 VDC

NiCd or NiMH rechargeable then 1.2 VDC at full charge.

I would let "direct" mean "linear." The answer then becomes simpler; direct proportional may mean a relationship like 1-1, 2-2, 3-3, etcetera. Proportional by itself would then be free to indicate other proportions; like 1-1, 2-4, 3-9, etcetera -- in an exponential proportion.

a. feasibility

On the inside of the blower panel door.

Work of some sort depending on the device being powered. For example, an electric car can transport people from point A to point B.

foil, toil

This is a 240 volt, two chimney heater (1500 watts per chimney) with a double pole thermostat. If the heater is not heating at all, indicates thermostat or electric source issue, if one element is heating and second is not, indicates one of the elements is burned out.

or somebody is trying to break in your house