J-box leads [RE-wrenches]

[Jim Duncan]

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Wrenches, I was doing an upgrade on 8 vintage BP275s and discovered that 
one of the old style terminal blocks had arced and melted at one cell 
string lead in the Jbox. The other 7 modules were OK and the array had 
been performing well inspite of the damage. However, one of the 3 
braided leads from the 2 cell strings was damaged and has only about one 
inch of discolored braid is left exposed from the back of the Jbox. 
I tried carefully buffing it with very fine emory cloth with hopes that 
I could solder on a new lead. But that seemed too extreme for such fine 
wires so I nixed that idea. Before I crimp on a new lead with a 
permanent butt splice, I thought there might be some clever solution to 
get a semi-permanent fix. Other than that, the panel looks like it may 
go another decade with a little luck.
Also I found one of the first random 3 diodes I checked had given up the 
ghost. I ordered a round of new diodes for them all. What is the life 
expectancy of those little guys and how do I determine if one is going 
south before it's too late. Do you routinly check diode performance or 
is this one a fluke? Oddly enough, it was not the diode at the fried 
terminal.
thanks

Jim Duncan
North Texas Renewable Energy Inc
Fort Worth, Texas

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