Battery backup installation

[c_picard]

Hey folks,
I'm about to install a battery backup system in conjunction with a grid tie solar inverter, and am curious about safety requirements with the batteries. I briefly looked through 70E, and the 1926.xx OSHA regs, I am thoroughly lost(it was a long hot day on the roof.
I found there is a threshold of 50V for the 70E section on batteries to kick in, but what about arc-flash hazards? I haven't seen specs yet, but presume there is a fair amount of current involved. Anyhow the boss' idea of safety(until I tell him otherwise) is to tell us to wear glasses and 'be careful'. The experience I have with batteries involved full flash suits(high voltage/current), or with wet cells aprons, face shields and overshoes.
Also it seems insulated tools would be a good idea, no?
Any help would be appreciated, I don't even like sunburns!

Charles

 

[sparkyboys]

i would recommend insulated tools, gloves, and a face shield. mainly because of the potential of the current stored in the batteries, which i am sure are bridged together. one slip and a wrench crosses the connections....boom!

 

[brian john]

i would recommend insulated tools, gloves, and a face shield. mainly because of the potential of the current stored in the batteries, which i am sure are bridged together. one slip and a wrench crosses the connections....boom!

Current is the same when seriesed, one cell has as much current as 240 cells in series, voltage adds. When you parallel current adds voltage will remain at the total string voltage.

 

[dereckbc]

In addition to the measure you have listed add eye wash to it.

 

[zog]

There is no calculations for arc flash on DC systems, yet, testing is in prorgess for more info. But there is an entire special section in the 70E just about battery systems and has all the safety info you would need. not sure how you could have missed it. You should also know IEEE Std 450 if you are doing any battery system intallations.