How to Select Armored Power Cable

One factor to ALWAYS consider is the environment in which the cable will be laid. The metal that makes up the armor must be compatible with the atmosphere, water drippings, mists, etc. to which it'll be exposed else it'll corrode, grow brittle, and break.

This was a major issue at an underground copper-nickel mine where I consulted for a short while. The original cables were aluminum-armored ones and they caused headaches without end to the mine's operations and maintenance staff. Many had to be out and out replaced ... which is VERY expensive and time-consuming in an underground mine.

Cheers! DZ

And don't let anyone tell you that plastic (or whatever) sheathing will protect the armor. ALWAYS ensure that the armor's metal is compatible with the environment where it'll be applied.