Should I use double-ended cordsets or should I build my own cables using bulk cable and field-attachable connectors?

If possible, you should consider using overmolded 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, overmolded 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.