crshears
Electrical
- Mar 23, 2013
- 1,858
Hello again all,
For the background to this post, please refer to: - Legacy Shipboard DC System Now Operating on AC.
I'm wrapping up the task of properly co-ordinating the 'hot' versus neutral fuses in all the old distribution panels.
Problem: since the old girl has spent time in both Canadian and US waters, there are quite a few different classes of plug fuse in use. For instance, there are many of the types W, TL, T and TC; as near as I can tell these are US designations. In addition to these, there are some that bear only the general and less-than-completely-helpful information 'time delay fuse ## amp...'
There are also numerous P and D fuses in use; Cooper/Bussmann describes these as 'rating for Canadian applications.'
To further complicate matters, virtually all of these come in 15, 20, 25 and 30 amp varieties.
What I'm looking to find out is where in the W / TL / T [/ TC?] continuum to sandwich 'P' and 'D' fuses...are the 'P' and 'D' ratings equivalent to specific US ratings, or do they fall somewhere in between, and if so, where? I've been doing Internet searches on the foregoing using evey term I can think of, but I'm still coming up short, no pun intended. Maybe it's that I don't exactly know what I'm looking at, but I've also tried to compare the various inverse current/time characteristics plotted out on the spec sheets provided by various manufacturers, but enlightenment has not come to pass.
H-E-L-P!
Carl
For the background to this post, please refer to: - Legacy Shipboard DC System Now Operating on AC.
I'm wrapping up the task of properly co-ordinating the 'hot' versus neutral fuses in all the old distribution panels.
Problem: since the old girl has spent time in both Canadian and US waters, there are quite a few different classes of plug fuse in use. For instance, there are many of the types W, TL, T and TC; as near as I can tell these are US designations. In addition to these, there are some that bear only the general and less-than-completely-helpful information 'time delay fuse ## amp...'
There are also numerous P and D fuses in use; Cooper/Bussmann describes these as 'rating
To further complicate matters, virtually all of these come in 15, 20, 25 and 30 amp varieties.
What I'm looking to find out is where in the W / TL / T [/ TC?] continuum to sandwich 'P' and 'D' fuses...are the 'P' and 'D' ratings equivalent to specific US ratings, or do they fall somewhere in between, and if so, where? I've been doing Internet searches on the foregoing using evey term I can think of, but I'm still coming up short, no pun intended. Maybe it's that I don't exactly know what I'm looking at, but I've also tried to compare the various inverse current/time characteristics plotted out on the spec sheets provided by various manufacturers, but enlightenment has not come to pass.
H-E-L-P!
Carl