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
The type of cable used for electrical service in homes, offices or commercial buildings depends on the application, load requirements and safety standards. Copper and aluminum conductors are typically the most popular choices because of their excellent electrical conductivity and durability. These cables are insulated and often covered with a sheath to protect against moisture, mechanical damage and fire hazards. A widely used option for home electrical wiring is non-metallic sheathed (NM) cable, also called Romex in some areas. It consists of two or more insulated conductors and a bare ground wire, wrapped in a protective sheath. This cable is ideal for indoor applications such as lighting, receptacles and general electrical circuits. For outdoor or underground installations, electricians often use underground feeder (UF) cable, which is moisture resistant and designed to last even when buried directly in the ground. For heavy-duty electrical applications, such as connecting the main power supply to the distribution box or powering large appliances, armored (AC) or steel wire armored (SWA) cables are used, which provide additional protection from physical damage and are suitable for both industrial and commercial applications. In some cases, service entrance (SE) cables are installed specifically to connect utility lines to a home's electrical panel to ensure a safe and reliable power supply. In modern electrical wiring systems, coaxial cables, Ethernet cables, and fiber optic cables can be considered part of the electrical service, especially in communications and smart home systems. In addition, flame-retardant and low smoke zero halogen (LSZH) cables are also in demand in high-rise buildings or hazardous areas to increase safety in an emergency.
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.
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common explanation of trailing power cables
Bad cable insulation worn off touching ground?
Replace the power cable.
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.
Voltage Grade of cables specifies the safe voltages which the insulation of the cable can withstand.
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The insulation resistance remains the same throughout the entire length of the conductor.