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What is the Difference between a Dielectric Test and a Megger Test?
a megger or hipot test involves raising the voltage of the wiring to 2x the operating voltage + 1000v answer volts/amps or ohms Dielectric test usually a sample of the oil is taken from the transformer answer is in ohm-cm dry devices will have the dielectric tests on file ... this is a very poor excuse ... the code need rewriting. the old standards were based on porcelain, oil, paper and cotton AI MI SWC DWC new types THN THWN THHN SO are generally based on a natural color when the tests are done so if you replace a cord on a drill the white and green wire has insulation that crumbles while the black is still flexable. thermoplastic insulation used for several years in damp locations with DC turns to a sticky goo.
What is the amperage rating of 500 MCM copper conductor?
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.
What is proper ground wire size for 100 hp 3 phase motor?
Wire size is based on the amperage that the load requires. For an accurate answer the motor amperage is needed. That said you can get an approximate figure by this method. 1 HP = 746 watts. This formula for amperage when HP is known. HP x 746/1.73 x Voltage x %Eff x pf. Use a Efficiency % at 90 and a power factor of .85. A horse power of 5 x 746 = 3730/1.73 x 220 x 90% x .85 = 12.81 amps. Code states that motor supply conductors have to be 125% of the full load amps = 16 amps. Code also states that conductors can only be loaded to 80% on continuous load which a motor falls into. A #12 copper wire 90 degree insulation is rated at 20 amps x 80% = 16 amps. A #12 wire will do the job. It will need a 40 amp three pole breaker, 50 amp non time delay fuse or a 30 amp time delay fuse to feed the motor.
What material is used for insulation on the outside of connecting wires?
Cross link polyvinyl chloride RW90 (PVC) and THHN are two common types of insulation THHN wire stands for thermoplastic high heat resistant nylon coated wire. THWN stands for thermoplastic heat- and moisture resistant nylon coated wire.
Is THWN wire used for dry locations only?
No. Per the National Electrical Code, table 310.13, THWN is suitable for dry and wet locations with a maximum operating temperature of 75o C. THWN-2 wire is suitable for dry and wet locations up to 90o C.
What is the Difference between a Dielectric Test and a Megger Test?
a megger or hipot test involves raising the voltage of the wiring to 2x the operating voltage + 1000v answer volts/amps or ohms Dielectric test usually a sample of the oil is taken from the transformer answer is in ohm-cm dry devices will have the dielectric tests on file ... this is a very poor excuse ... the code need rewriting. the old standards were based on porcelain, oil, paper and cotton AI MI SWC DWC new types THN THWN THHN SO are generally based on a natural color when the tests are done so if you replace a cord on a drill the white and green wire has insulation that crumbles while the black is still flexable. thermoplastic insulation used for several years in damp locations with DC turns to a sticky goo.
How many 10 awg thwn fit in half inch emc conduit?
11
How many amps 8 gauge wire?
A #8 copper conductor with an insulation factor of 60 degrees C is rated at 40 amps, insulation factor of 75 or 90 degrees C is rated at 45 amps.If the breakers rating is 90 degrees C then the amperage can be boosted for 60 degree wire to 40 amps, 75 degree C wire to 50 amps and 90 degree C wire to55 amps.
How computer resets its time after turning it on?
If it is connected to the internet thwn it can get the time from the internet time service.
They take first poseing a question then obbserving then anwsering the qwesion thwn pose a hypothesis?
Scientists.
What is 16 AWG THHNTWN?
I think you mean 16 AWG THWN. It's coating for PVC piping.
What is the smallest size emt conduit that can be used with nineteen 10 gauge thwn wires?
1 1/2 inch
What is the smallest size emt conduit that can be used with three 14 gauge thwn wires and four 6 gauge thwn wires?
This is per the NEC Handbook, 2005 edition. Your municipality may use different rules. I am not an electrician. Per Table 5, chapter 9: Approximate area of 14 ga. THWN is 0.0097 sq. in. Approximate area of 6 ga. THWN is 0.0507 sq. in. 0.0097 * 3 = 0.0291 0.0507 * 4 = 0.2028 ...total area 0.2319 sq. in. Per table 1 chapter 9, you are allowed 40% fill for more than two wires in EMT. So, 0.2319 / 0.4 = 5.7975 sq. in. minimum conduit area, which means you'd have to use 2-1/2 inch trade size EMT, which is 5.858 sq. in. Hope this helps.
How much cost the aggregate that used for mixing one ton of asphaltic concrete?
First find out how much concrete is needed for your project thwn do the calculations.
How can you say a boy that you like him?
You have to make sure none of his friends are around then you have to tell if he hangs out with you alot, if he does then he probally likes you. Then wwhen he lokks into your eyes you can say I love you. if he says,"what?!?!?!?" thwn say,"I was just joking"
