TheLake
Veteran Member
- Joined
- Oct 16, 2021
- Messages
- 58
- Vessel Name
- The Lake
- Vessel Make
- 42' CHB Tricabin
Hi all,
I just need some reassurance that I haven't made an error in my thought process.
When calculating DC cable length to put into a sizing calculator, it is the total length. However, should it be broken down by segments.
Example:
From the breaker panel to a fuse block:
- 100 amp capacity at the fuse block
- 4 foot run from the breaker to the fuse block (8 feet total)
At the fuse block:
- multiple small circuits (branch circuits) of varying length.
My question (or need for validation):
- I believe that I should calculate the total run between the breaker and the fuse block and size that wire for the max amp at the fuse block (AWG 6 cable)
- then I should calculate the runs from the fuse block to the devices
- for example - if a run is from the fuse block for 40' (return) for a <1amp LED light I would use AWG 18 on this run (sheathed)
I wanted to assure that I wasn't mistaking this by calculating the run length from the circuit breaker through the fuse block and to the end device when calculating the size (as this would give a very large cable size).
Just a sanity check please.
Thanks,
Chris
I just need some reassurance that I haven't made an error in my thought process.
When calculating DC cable length to put into a sizing calculator, it is the total length. However, should it be broken down by segments.
Example:
From the breaker panel to a fuse block:
- 100 amp capacity at the fuse block
- 4 foot run from the breaker to the fuse block (8 feet total)
At the fuse block:
- multiple small circuits (branch circuits) of varying length.
My question (or need for validation):
- I believe that I should calculate the total run between the breaker and the fuse block and size that wire for the max amp at the fuse block (AWG 6 cable)
- then I should calculate the runs from the fuse block to the devices
- for example - if a run is from the fuse block for 40' (return) for a <1amp LED light I would use AWG 18 on this run (sheathed)
I wanted to assure that I wasn't mistaking this by calculating the run length from the circuit breaker through the fuse block and to the end device when calculating the size (as this would give a very large cable size).
Just a sanity check please.
Thanks,
Chris