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Insulated wire is not used for high voltage installations. For transmission installations ACSR is used. It is Aluminum Conductor Steel Reinforced cable that is strung from tower to tower. The insulation comes from the separation of the conductors and the amount of insulators that support the wires from the tower frames. Common insulators have a rating of 5000 volts. To get to higher voltages they are strung together boosting the insulation rating by 5000 volts each time another insulator is added to the string.
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How can you cut an energized conductor?
With an insulated handle wire cutter.
Can you double up on insulated wires for greater ampacity?
According to the 2008 National Electrical Code, the smallest wire that can be run in parallel is a 1/0 AWG (American Wire Gauge). If the wire you are using is smaller than a 1/0 AWG, you will need to increase the size of the wire to handle the amperage (Table 310.16 of the NEC).
Is a copper wire a ground wire?
Yes, if it is not an insulated wire. If it is bare copper it is always ground. But the hot and neutral wire are also copper, they are just insulated.
What is the difference is 22D and 22M for connector contact size ratings?
22 will handle wire sizes 22-26 22D will handle wire sizes 22-28 22M will handle wire sizes 22-24
Can wire size make a difference to the amperage?
Yes, as the wire size physically becomes larger so doesits capacity to handle a larger current.
