See page 61 of the USCG Electrical Systems pdf, available from the eboat forum site.
Specifically, a 3/4 inch diameter metal ball should not be able to cause a short circuit
on any unprotected terminal. I'm being very conservative, as circuits which are switched or fused are exempt. I do feel it is a good rule of thumb, however, as controllers and electric motors idle in silence. When you are working on an idling diesel, there is little doubt of the present danger. A live controller doesn't sound any warning. Insulating and protecting agianst casual contact can save a lot of grief.
Be Well,
Arby
On Aug 8, 2009, at 8:47 PM, "JJ Johnson" <jjoftheusa@yahoo.
--- In electricboats@
>
> Hi Cris,
> ... Of particular note is the 3/4" conductive sphere test...>
> Arby
>
Of particular interest is your reference to the '3/4"conductive sphere test'. Would you mind putting into plane English just what you mean by this statement. Many of us out here that have no idea what a "conductive sphere test" is and why it is important to an e-drive in the marine environment.
A curious id-ten-t wants to know.
[Non-text portions of this message have been removed]
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch format to Traditional
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
No comments:
Post a Comment