Battery cutoff switch

russcc said:
Been using the the Cole Hersee switch. Best quality, believe they are still made in the USA at Cole Hersee in South Boston. Some favor switching the positive or hot side. NHRA or not, the best method is switching the ground. With the ground disconnected nothing happens anywhere, now how.
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Sorry to say the Cole Hersee cut out switch are now made in Mexico. The box still has Boston, Ma. USA, but has a sticker bar code stating "Made In Mexico"
The only thing we still make in the USA are babies!:cool:
 
JSeery,

As an electrical engineer what is the science or reason behind switching the "hot" side?

I advocated the ground side for operator safety reasons but it does seem that switches are on the hot side normally. Is there a purpose to this or just standardization?
 
Totally disagree, disconnecting ether post will totally disconnect the system with one exception, the hot post on the battery will remain hot relative to the ground (frame etc). When working near the battery it would be possible to short across the battery post to ground, thus the recommendation to disconnect the ground when working on a car. As far as I know every racing association requires the disconnect to be on the hot side (if anyone knows different let me know). As a practical measure ether post will work. But one would assume racing association rules are established for valid reasons.
 
JSeery said:
Totally disagree, disconnecting ether post will totally disconnect the system with one exception, the hot post on the battery will remain hot relative to the ground (frame etc). When working near the battery it would be possible to short across the battery post to ground, thus the recommendation to disconnect the ground when working on a car. As far as I know every racing association requires the disconnect to be on the hot side (if anyone knows different let me know). As a practical measure ether post will work. But one would assume racing association rules are established for valid reasons.
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That one exception is why it is better to put the switch in the ground side!

With the switch in the ground side that is the same as disconnecting the ground as recommended in the manuals.
Bill
 
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