Just like an extension cord has a male plug on one end and a female plug on the other, an MC4 extension cable has a male connector on one end and a female connector on the opposite end. They are available in many different lengths from 8 feet to 100 feet long. Let's go back to our first example of wiring two modules in series.Can MC4 connectors be unplugged?
They meet the requirements of the National Electric Code, they're UL certified and the preferred connection method of electrical inspectors. Due to the locking mechanism of the MC4 connectors, they will not come unplugged and are well suited for outdoor environments. The connectors can be separated but it requires a special MC4 unlocking tool.Why do solar modules have MC4 connectors on the end?
If you're asking this question, you've probably noticed that most modern high power solar modules are manufactured with wire leads that have MC4 connectors on the ends. Years ago, solar modules were built with a junction box on the back that required the installer to manually attach wires to the positive and negative terminal posts.What is the positive and negative wire on an MC4 connector?
One wire is the DC positive (+) and the other is the DC negative (-). Generally, the female MC4 connector is associated with the positive lead and the male connector is associated with the negative lead.