Is it necessary to replace ungrounded 2 conductor wire?

Old 09-26-14, 11:05 AM
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Is it necessary to replace ungrounded 2 conductor wire?

I have a top floor ceiling with lighting boxes that use ungrounded 2 conductor wire. Most of the ceiling boxes were upgraded to fan boxes and have fans with light kits operated by pull cords and light switches in wall boxes. The wires running to the light switches are 2 ungrounded. None are knob and tub. There are no outlets that are ungrounded, only ceiling boxes and light switches are ungrounded.

I am considering foam insulation which will make upgrading wiring very difficult.

Is it necessary for me to upgrade the ceiling fans and lights to ungrounded wire?
Old 09-26-14, 12:28 PM
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If you upgrade the wiring from the switch to the ceiling box, you will have to do it from the ceiling box to the breaker panel so it will be continuous. Although it is not "necessary", it is desirable to have grounding at all points of outlet. Is the wire in conduit or BX, or is it cable. If the latter, is it cloth covered? These things will be deciding factors as well.

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