Class T fuse source request [RE-wrenches]

[Christopher Freitas --- OutBack Power]

There are some assumptions in this "rule" - that the DC cables, when 
used with a breaker, will be in a raceway/conduit - while the fuses 
would be used with DC cables in free air.  If I remember correctly both 
are rounded up to the next standard overcurrent device rating as well - 
as allowed by the NEC.  

Since it is not a big deal to reset a large DC breaker - it can be sized 
closer to the actual current of the inverter.  With the class-T fues 
they are expensive - so giving them plenty of margin will keep them from 
blowing.  

It sure has always seemed odd that the NEC allows RVs to not have any 
requirements for conduit for the DC cables or a means of disconnect 
(i.e. breaker) and instead allows just a fuse...  

Christopher Freitas
OutBack Power Systems, Inc.
cfreitas @ outbackpower.com  
www.outbackpower.com
Arlington WA USA
Tel 360 435 6030  


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