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Gosh, I couldn't say...but, if you're asking because you're trying to choose which one to use I have to say DONT use polystyrene..not in the loft anyway! In the loft, the beads will attach themselves to your wiring, over time, and eat their way through them. And are a fire hazard. BUT, if it's for in your walls, I believe polybeads have a higher u-value thus insulate better. Rockwool is a very good product though, been around for decades, is inert and also used in hospitals (internal walls) to stop the spread of fire.

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It depends what you mean by a 'high rating'!If you mean a high 'voltage rating' then, yes, you will require thicker insulation. But if you mean a high 'power rating', then, not necessarily, because the voltage can be low, while the current is high.Remember, the thickness of insulation depends on the voltage, while the type of insulation (how it withstands higher temperatures) depends on the current.

It depends on a lot of factors. Generally speaking, if the insulation is THHN then the rating is 350 amps. If the insulation is THWN then the rating is 310 amps. The ampere rating for wire depends on the temperature of the environment it will be used in, the insulation rating and the number of circuits installed in a conduit. There are also other factors to consider... like voltage drop in long runs.

insulation

You can use an insulation rating 5000 volt to run 4160 volt supply.

good in walls, but not enough for attic./ceilings

It is the chemical components that make up the insulation on some types of wire. Cross-Linked Polyethylene Insulation (XLPE), High Heat Resistant, 90ÂºC Rating, Wet and Dry Locations.

The conductors on and in the lighting fixture should have an insulation rating of 105 degrees C. The supply conductors to the junction box that the fixture is hung from or connected to should have an insulation rating of 90 degree C.

V90 is a higher temperature rating than V75. V90 cables can conduct more current without over heating/melting its insulation. V110 is a higher rating than V90.

A #6 AWG copper wire with 60 degree Celsius insulation rating can carry 55 amps, 75 degree Celsius insulation rating can carry 65 amps, and a 90 degree Celsius insulation rating can carry 75 amps. If it is aluminum or copper-clad aluminum the ampacity for the three temperature ratings would be 40, 50, and 60 respectively.

A #3 copper wire with an insulation rating of 90 degree C has the capacity to receive 105 amps. This is the most common or standard insulation that most calculations are based on. It is the insulation that governs the rating of the voltage. House wiring cables are insulation rated at 300 volts. Most other wiring insulation is rated at 600 volts. Special wires have a insulation factor of 1000 volts. The higher the insulation temperature factor is the higher the rating of current through the wire becomes. #3 at 60C is 55 amps, at 75C 65 amps, at 90C 105 amps, at 110C 120 amps, at 125C 130 amps, and at 200C 145 amps.

A #12 copper wire with an insulation rating of 60, 75 or 90 degrees C is rated at 20 amps.

A #12 copper wire with an insulation rating of 60, 75 or 90 degrees C is rated at 20 amps.

Knowing the power rating of a transformer will help an operator use the transformer within its design limitations with regard to heating of the windings and their insulation.

Voltage rating is dependent on the insulation, not the wire gauge. An AWG 6 wire is rated at 50 Amps.

Wire with an insulation rating factor of 300 volts.

No, it has to do with the insulation rating of the individual cords. 12 volts can be used on a voltage rating of 120 volts. But 120 volts can not be used on a 12 volt rated cord. As a point of interest most power cords have an insulation rating of 300 volts.

The four main conductor insulation rated temperatures that are used in the electrical trade are 60, 75, 90, and 105 degrees C.

A #3 copper wire with insulation rating of 90 degrees C has an amperage rating of 105 amps.

The voltage that a wire can have suppressed upon it is governed by the rating of the insulation that surrounds the wire. Common insulation voltages are 300, 600 and 1000 volts.

In a high voltage installation, with the same power, current drawn is small compared to those in low voltage. However it requires a thicker insulation, thus cost of insulation is significant compared to the conductor cost. By using a star connected winding, the insulation voltage required is equal to line to neutral connection, otherwise if it is connected in delta the insulation rating has to be provided for a line to line connection. Despite having a higher current, the total cost is still lower compared to using a higher insulation rating.

A #2 copper wire, 90 degree C insulation rating, is rated at 120 amps. With 75 degree C insulation, 115 amps and with 60 degree C insulation 100 amps.

There are many types of styrofoam. The white, bubbly expanded sheets have a very low R rating. The denser extruded styrofoam comes as polystyrene or polyurethane based, in blue or pink sheets. I believe they are 5 and 7 R rated, but all the sheets are marked very prominently with their respective ratings and uses.

Yes. <<>> A #10 copper conductor with an insulation rating of 90 degrees C is rated at 30 amps. A #14 copper conductor with an insulation rating of 90 degrees C is rated at 15 amps.

Wire size determines how much current can be safely conducted. Insulation type and rating determines other factors, such as where the wire can be used and maximum voltage. It should be noted that the high voltage lines that are hanging from the really large electrical towers are among a class of wires that have NO insulation around the outside of the wire. They are instead, connected to the towers with large insulators that prevent electrical energy from being lost through the towers.

The rating of 350 MCM aluminum wire with insulation rated at 60, 75 and 90 degrees C is 210, 250 and 260 amps respectively.