The metal end fittings crimped onto a cable so it bolts to a stud (lug) or seats in a terminal (ferrule). A proper crimp + heat-shrink makes a gas-tight, low-resistance joint.
The end fitting is where most bad connections hide. A proper crimped lug or ferrule with heat-shrink makes a gas-tight, low-resistance joint that lasts; a poor one runs hot.
Lugs bolt heavy cable to studs and busbars; ferrules seat fine strands into terminals. Both are crimped — not just twisted — onto the conductor.
Design your van, boat, cabin or RV system in Wattonomy and it specifies the cable terminations alongside the gauge so each end is built for a solid, low-resistance joint — from the appliances you actually run, sized to the recognized standard for your region. You see it on the wiring diagram, in the sized parts list, and in a plain-English build pack that explains the reasoning behind every choice. No account, no email — about a minute to a complete, validated design.
A lug is a ring/eyelet crimped on to bolt cable to a stud or busbar; a ferrule is a sleeve crimped onto fine strands so they seat cleanly in a screw terminal.
Crimp. A proper crimp (ideally with adhesive heat-shrink) makes a gas-tight, low-resistance, vibration-proof joint — a twist does not and will eventually run hot.
It takes about a minute. No account, no email.