dating electrical wiring

The original wiring was and still is bx. Although the actual wire covering may have degraded over the decades, the porcelain standoffs have a nearly unlimited lifespan and will keep any bare wires safely insulated. When it becomes necessary to carry wires through partitions and floors, they must be secured against contact with metal, or other conducting substance, in a manner approved by the Inspector of the Board. For a better experience, please enable JavaScript in your browser before proceeding. Hello all, I wonder if anyone with a knowledge of early 20th century electrical wiring could suggest a rough date for some old wiring I have uncovered. Other ceramic pieces would typically be used as a junction point between the wiring system proper, and the more flexible cloth-clad wiring found in light fixtures or other permanent, hard-wired devices. Panel feed wires.

DATING ELECTRICAL WIRING / janiceclark.net

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