Trumpy, If I am looking at the correct wires that you had a question on, that would be the manufacturer's installed connection to the main disconnect which was removed. I am finding less exposed bars and more covered wiring being used by manufacturer's to connect the meter sockets to the main disconnects. On the Brand of clamp meter, I will need to check and get back to you. It was on special at a local Harbor Freight store for $9.95 and I couldn't resist picking one up. Made in China and surprisingly versatile. It even came with batteries.
