If possible, you should consider using over molded double ended cordsets since they are less expensive and they tend to be more reliable than cables made using bulk cable and field attachable connectors. Unfortunately, over molded double ended cordsets only come in a limited number of lengths, so there might be occasions where you will need to make a long or custom length cable using bulk cable and field attachable connectors. If you have to make your own cable, follow the instructions carefully and you will end up with a waterproof, long lasting cable.