Safer, but only if done correctly. In addition to the QUAD, he'll need an AL
rated breaker that is listed for 2/0 - probably 100 amps. On the AC side,
he'll need a subpanel, and a 20 amp breaker, followed by an appropriate
outlet. Also, since it's now a subpanel, it wouldn't hurt to drive a ground
rod. While he's at it, he might as well mount his extension cord.
Can't run triplex in a building without conduit for two reasons. The ground
is exposed, the PE insulation burns readily. Also, and you need a grounded,
and grounding conductor for the subpanel.
2 thoughts on top of the 10 or so others-
1) If I were to plug something hot-n-heavy into an outlet, and wanted
the best chance of having minimal losses, I'd swap the outlet to a
commercial outlet. If it were a 20A circuit, I'd put on a 20A outlet.
2) If a suitable (outlet) circuit exists that runs reasonably near the
location, you could (or could have an electrician) convert an outlet to
a box that would then go to surface conduit that could run the outlet
to the desired location. Your landlord may go nuts over this, though.
To make this solution better, go from the 1st outlet in a chain, and
disconnect the chain. Since this is in a bathroom, the bathroom may be
on its own breaker.
3) If you supply the money, will the landlord supply an electrician to
place an outlet?
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