OK to use heat-shrink tube on 110v black wire?

I was installing a replacement floodlight on my deck yesterday. The junction box is embedded into the exterior brick and has black, white & (bare copper) ground. After I removed the old fixture, I discovered that there was some electrical tape wrapped around the black wire. Upon removing the tape, I saw that the insulation on the black wire was cracked and that some bare wire was exposed.

Having had a lot of experience with automotive electrical work, I got some heat-shrink tubing from Radio Shack and installed a section over the black wire. After shrinking it on, I wrapped as much of the black wire + tubing with electrical tape as I could- for good measure.

Was it OK to use heat-shrink tubing on the hot (black) wire? I am a bit worried now that 110v AC is too much for the heat-shrink and will melt it. I cannot find anything that says "definitely OK" or "definitely not OK".... so I am asking here.

-Randy

 

Heat shrink is normally worth about 600 volts/mil so you are OK on the voltage. The temperature required to shrink it is higher than 90 C so you are OK on the temp rating. You have made a safe and legit repair. The code only says at least as good as what you had.

 

thanks - good to know my repair is OK.

-Randy