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If a cable insulation is described as RHW, you would be able to use the cable for what maximum temperature
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).
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The difference is the type of insulation on the conductors. Type AC used a thermoset insulation , Type ACT is a theromplactic insulation.
Velocity factor depends to a large extent on the dielectric (insulation) used. You will have to specify the exact cable to answer this question.
If a cable insulation is described as RHW, you would be able to use the cable for what maximum temperature
as an insulation
Copper cable with PVC insulation
Southwire, a manufacturer of this type of cable defines ACT as a multiple conductor thermoplastic insulated cable with steel spiralled interlocking armour. The armour has the appearance of flexible conduit. AC cable is also known as BX cable. Common insulation materials thermoset and thermoplastic as used in AC cable. Type AC cable have different identifiers and insulation type. Type ACTHH has 194 degree (90 degree Celsius) thermoplastic insulation. Type ACTH has 167 degree (75 degree Celsius) thermoplastic insulation. Type AC has thermoset insulation. Type ACHH has 194 degree (90 degree Celsius) thermoset insulation.
No. A volt-ohmmeter will not check insulation. To check cable insulation you need a special device (called a megger) made for the purpose that imposes a high voltage and measures current leaks.
Bad cable insulation worn off touching ground?
Replace the power cable.
common explanation of trailing power cables
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Voltage Grade of cables specifies the safe voltages which the insulation of the cable can withstand.
The insulation resistance remains the same throughout the entire length of the conductor.
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).