
If you don't know who Gary Gygax is, then you aren't nerdy enough to read my blog. It's an inside joke, and you don't get it. Ha Ha Ha!
To enable friends and family to keep up with what I'm doing, offer my own insights on life, and tell a funny story once in awhile.
There are 16 cables (8 positive, 8 negative) size 500 kcmil, providing 3200 amps of current to this crane. Some of the feeders themselves melted. The problem was first noticed when a steelworker walked past a manhole cover and noticed steam coming out of it. Upon further investigation, 5 of the 16 cables were found to be open. The steam was caused by the current flowing between cables, which heated up the water in the manhole.
For each of the 5 cables, we found several feet of missing conductor. That's right, several pounds of copper were simply boiled away. The cause was traced to improper splicing. The splice connectors weren't properly insulated, allowing water intrusion (the cables were submerged), which caused a short between DC positive and DC negative cables and ground, which caused the cables to heat up. A lot.