08/18/2021
WIRE CONNECTIONS – DOS AND DON’TS
Well made electrical connections are essential for the performance and safety of a boat’s electrical system and even the best system design can be compromised by a faulty connection.
PART 4 - MULTIPLE CONNECTIONS
While not complete, the below list contains the most important requirements that apply to multiple wire terminations.
• No more than four terminals are allowed to be secured to any one terminal stud. If additional connections are necessary, you can connect two or more terminal studs with jumpers or copper straps.
• The highest ampacity conductor terminal should be placed closest to the base, followed by successively smaller ampacity conductor terminals.
We often see that done incorrectly, where the small wire is tucked under the bigger terminal, which can lead to a situation where the small wire and the terminal become part of the current path intended for the larger conductor.
• Multiple wires can be crimped into a single terminal only if
- the combined cross-sectional area of the conductors does not exceed the cross-sectional area capacity of the terminal and,
- when pulling on the smallest conductor, the connection can withstand forces specified in E-11 Table 13.
If you want to learn more about making good, long-lasting electrical connections, follow the link below and check out ABYC's online learning course - WIRING TERMINATIONS, which takes a close look at the fundamentals of wire selection, terminal types, necessary tools, and general installation best practices.
Preview:
https://www.youtube.com/watch?v=MUqRmlJw5oE
Full course:
https://abyc.elevate.commpartners.com/products/wiring-terminations