It is becase of not meeting each other
The insulation resistance remains the same throughout the entire length of the conductor.
I think you mean 'insulation resistance'. This is exactly what it says it is, it is the resistance between opposite sides of an insulator or dielectric. It is in the order of megohms and, in the case of a cable, is inversely proportional to its length -i.e. the longer the cable, the lower its insulation resistance.
No. Conductor resistance is. Cable insulation resistance to ground is inversely proportional to its length. The longer the cable, the more leakage path to ground; therefore, the lower the insulation resistance to ground.
Estimated Insulation Resistance of a cable:IR = K log (D/d)K = specific insulation resistance in megohs - 1000 feet at 60 Deg. F (K = 2000 for PVC; 50,000 for EPR; 100,000 for XLP)D = diameter over insulationd = diameter under insulationIR = insulation resistance in megohms - 1000 feet. Note that IR is inversely proportional to the cable length. So don't forget to divide the calculated IR for 1000 ft. by your Cable Length (L) then multiplied by 1000.Be advised that in the real world, the measured IR may not be anywhere close to the calculated IR due to extraneous influences such as humidity, temperature, dirt, etc.
Armored electrical cable contains insulated electrical service wires protected by a flexible steel covering. Metallic Conduit is a tube or pipe though which we lay electrical cable.(Most commonly lighting cables).
To strip the insulation of wires in preparation for making electrical connections with them.
Copper cable with PVC insulation
The insulation resistance remains the same throughout the entire length of the conductor.
I think you mean 'insulation resistance'. This is exactly what it says it is, it is the resistance between opposite sides of an insulator or dielectric. It is in the order of megohms and, in the case of a cable, is inversely proportional to its length -i.e. the longer the cable, the lower its insulation resistance.
MIMS = Mineral Insulated Metal Sheathed Cable, It is an electrical cable resistant to fire etc. Basically copper cores in a metal tube, filled with magnesium oxide powder as insulation. Very similar to MICC but with other metals instead of a copper sheath.
eat dick
Insulation resistance should be approximately one megohm for each 1,000 volts of operating voltage, with a minimum value of one megohm. For example, a motor rated at 2,400 volts should have a minimum insulation resistance of 2.4 megohms.
Heat tracing can be of 2 types: 1] Electrical Heat tracing: 2] Steam Tracing: Electrical heat tracing can be described as an insulated electrical heating cable, which is spiralled around the process fluid pipe( or object that needs to be heated), after which the pipe and tracing is insulated with the appropriate type and thickness of insulation lagging material. In steam tracing, instead of electrical heating cable, small pile is spiralled which carry steam thereby heating the desired object.
The minimum acceptable insulation resistance value is calculated using the following formula: Rinsulation= (Vrated + 1 ) x (304.8 / L ) Where: Rinsulation is the minimum acceptable insulation resistance value, in mega-ohms; Vrated is the rated voltage of the cable (typically printed on the cable), in kilovolts; and L is the length of the cable, in meters (if the cable length is in feet, replace the number 304.8 with 1000).
when length is increased insulation resistance of cable is decresed i.e.,R is inversely proportional to L where R is resistance L is length
Yes, of course they are insulated. If they were not the signals would short out and be unusable. If electric power cords were not insulated they would short out and blow the breaker (or worse start a fire)!
No. Conductor resistance is. Cable insulation resistance to ground is inversely proportional to its length. The longer the cable, the more leakage path to ground; therefore, the lower the insulation resistance to ground.