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Been searching a couple hours, including here, but didn't find anybody discussing the question.
Putting the "catastrophic" fuse as close to the battery as possible is well-documented; any wire before the fuse isn't protected so you want it short and ideally in conduit. I get that.
It seems there is a risk, when using a tool on the hot-side hardware of the fuse holder, of accidentally grounding the handle (especially in an RV with cramped space). In that event there would be no OCP. If the battery disconnect were upstream of the fuse, the user could de-energize the whole fuse holder -- but that would mean even more unprotected cable, plus the switch itself and two cable terminations, upstream of the fuse an unprotected. Is the fuse-replacement risk just part of the general risk of electrical work, or should it be factored in? Are there other requirements for clearance or access in place that are meant to address it?
I read a portion of the AYBC code (11.10.1.1), as well as sections 240, 551, 706, 710 of NEC 2020 online but didn't spot any explicit guidance. However, I realize it takes a lot more than a simple pass through of a few select sections to really understand the Code. So I was hoping y'all might be able to offer some clarification.
Putting the "catastrophic" fuse as close to the battery as possible is well-documented; any wire before the fuse isn't protected so you want it short and ideally in conduit. I get that.
It seems there is a risk, when using a tool on the hot-side hardware of the fuse holder, of accidentally grounding the handle (especially in an RV with cramped space). In that event there would be no OCP. If the battery disconnect were upstream of the fuse, the user could de-energize the whole fuse holder -- but that would mean even more unprotected cable, plus the switch itself and two cable terminations, upstream of the fuse an unprotected. Is the fuse-replacement risk just part of the general risk of electrical work, or should it be factored in? Are there other requirements for clearance or access in place that are meant to address it?
I read a portion of the AYBC code (11.10.1.1), as well as sections 240, 551, 706, 710 of NEC 2020 online but didn't spot any explicit guidance. However, I realize it takes a lot more than a simple pass through of a few select sections to really understand the Code. So I was hoping y'all might be able to offer some clarification.
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