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I’ve recently being to a warehouse to look into an issue with there battery backup emergency lighting. It’s quite the complex set up with all sorts happening, also it’s an old system but no drawings.
The problem is the voltage to the lights in test mode is not getting to 110v.
This is the only thing I could see anything that looked off, but I have no idea what it is , an where to get a replacement . There’s no product details anywhere on it