[volt-nuts] Fluke 5200a extender

[Mark Sims]

I recently bought a small insulation tester DMM off of Ebay ($20, search for "bm500a insulation tester").  It can test at 250/500/1000V.  I built up three of the 5200A extender cables and tested them.  There were no problems at 1000V (even though the ribbon cables are only rated for 300V and there are some pretty tight clearances on the boards where etches are routed between pins of the ribbon cable headers).  It looks like there should be no problem handling the max 190V potential difference between two adjacent pins on the 5200A bus.
I tested the cables by shorting all the top side pins and shorting all the bottom side pins on an edge connector,  hooking the completed extenders to that edge connector,  and testing the resistance between the top side and bottom sides.  That tests all the adjacent wires on the ribbons and the tight clearances.