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What are the fire rating properties of expanded polystyrene and rock and wool insulation?
Wiki User
∙ 14y ago
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.
Wiki User
∙ 14y ago
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Can you use a 12v 60hz 210 va power cord to replace a 120v 60hz 150w cord?
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.
What is the maximum temperature rating of a wire's insulation on a conductor?
The four main conductor insulation rated temperatures that are used in the electrical trade are 60, 75, 90, and 105 degrees C.
What is more important for amperage rating wire size or insulation temperature rating?
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.
How many amps is a 3 gauge copper wire rated for at 115 volts?
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.
What size wire for 12vdc 35 amps?
A #8 wire with an insulation rating of 75 or 90 degrees C is rated at 45amps respectively.
Does a high rating mean lots of insulation or little insulation?
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.
An R-value is a rating for materials used as?
insulation
What is 4160 Volt electrical wire insulation rated for?
You can use an insulation rating 5000 volt to run 4160 volt supply.
How good is an insulation rating of R33?
good in walls, but not enough for attic./ceilings
What is the difference by v-75 PVC sheathed insulation and v-90 v-75 PVC sheathed insulation?
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.
What type of conductor should be used for wiring on fixture?
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.
What is the R-value of styrofoam?
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.
What does the power rating of a transformer imply?
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.
Can you use a 12v 60hz 210 va power cord to replace a 120v 60hz 150w cord?
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.
100 amp subpanel from 200amp service what size wire do you use?
A #4 copper conductor with an insulation factor of 75 or 90 degrees C is rated at 85 amps.
How many volts a 2.00mm wire can have a maximum load?
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.
What is the maximum temperature rating of a wire's insulation on a conductor?
The four main conductor insulation rated temperatures that are used in the electrical trade are 60, 75, 90, and 105 degrees C.
