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Question:

Are 240 Volt double pole breaker connectors different on some?

I have never had to change out any of my circuit breakers yet, but I bought some, to have on hand just in case.My Breaker box is a Square D, so I got that kind of breakers.I noticed when I got home that the 40A breaker had two silver and two brass connectors on the bottom.But the 30A had two silver connectors and only one brass connector.Is this the way they are suppose to be? Or did I get some that are missing a connector?

Answer:

If I understand your description the brass connectors you refer to are the grips to hold the breaker in place. The silver connectors snap down on the Buss Bar providing power. This is the way some of them are. Nothing to worry about. The compound referred to is a gray paste designed to insure connection between dissimilar metals. It is also known as No-lox. Under normal operating conditions a breaker should not need to be replaced. If it does, you need to determine what caused it to fail. ie repeated short circuiting, overloading, moisture etc. and correct that condition. When replacing a breaker look at the buss bar. If it appears to be discolored or pitted, move the breaker to a new location if possible. I'm sure you know this but DO NOT attempt to repair the buss bar with the power on. We have a saying: there are OLD electricians and BOLD electricians, but NO OLD BOLD electricians! Good luck to you sir.
Dec 7, 2017
Give Lediy99 a best answer. This is just due to a change in manufacturing. The older breakers had 2 rail grips. The newer ones only have one. Either will work fine in your panel. FYI: Square D makes 2 styles of panels/breakers. They are not interchangeable. The style that you have is known as QO. The other one is called Homeline
Dec 7, 2017
Anderson plugs are typically grey in colour and are the same in both plug and socket form. A battery which is low on charge can be much more effectively boosted using this setup as the heavier gauge wire allows much freer passage of current. Powerpole connectors are physically and electrically hermaphroditic, thus avoiding the need to worry about which end is the plug and which the socket, or which end has the correct polarity. This is in contrast to the physically but not electrically hermaphroditic 2-wire trailer plug.
Dec 7, 2017
Mine doesn't have but one connection point on each breaker, 220 has a connection on each of the double pole breakers,but maybe i missed something there.
Dec 7, 2017
There's nothing wrong with your spares. Kudos to you for having them. If you are going to connect them to copper-clad aluminum or aluminum wiring, don't forget to apply some De-Ox or other anti-corrosive.
Dec 7, 2017

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