larry cad
Whatever.....
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Salvo wrote:Please list the failures where it's better to have a bond (in RV). I know of none.
Sal
The system bonding jumper is a conductor, screw, or strap that bonds the metal parts of an SDS to the system neutral point. The system bonding jumper provides a low-impedance fault current path to the power supply to facilitate the clearing of a ground fault by opening the circuit overcurrent device.
During a ground fault, metal parts of electrical equipment, metal piping, and structural steel will become energized. This situation provides the potential for electric shock and fire. The system bonding jumper resolves this situation by creating a path from the metal parts back to the source and allows overcurrent devices to operate, thereby removing the dangerous condition.
Salvo, this is certainly the one I would be most concerned about.
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Salvo
California
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larry cad wrote:Salvo wrote:Please list the failures where it's better to have a bond (in RV). I know of none.
Sal
During a ground fault, metal parts of electrical equipment, metal piping, and structural steel will become energized. This situation provides the potential for electric shock and fire. The system bonding jumper resolves this situation by creating a path from the metal parts back to the source and allows overcurrent devices to operate, thereby removing the dangerous condition.
Salvo, this is certainly the one I would be most concerned about.
Bonding is one of the factors that caused the sparks to fly, destruction of equipment, death, possibility of fire, etc. Yes, fuses or breakers can blow, but not before the above mentioned can happen. 15A needs to flow before the fuse blows. What if it's not a hard short, but only 10A flow? The breaker will not trip. Something will get awful hot.
This scenario will not happen in an unbonded system. Not with one fault. There are no equipment loss, deaths, fire or what ever.
Sal
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Broccoli1
Los Angeles
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Joined: 02/28/2007
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Salvo wrote:larry cad wrote:Salvo wrote:Please list the failures where it's better to have a bond (in RV). I know of none.
Sal
During a ground fault, metal parts of electrical equipment, metal piping, and structural steel will become energized. This situation provides the potential for electric shock and fire. The system bonding jumper resolves this situation by creating a path from the metal parts back to the source and allows overcurrent devices to operate, thereby removing the dangerous condition.
Salvo, this is certainly the one I would be most concerned about.
Bonding is one of the factors that caused the sparks to fly, destruction of equipment, death, possibility of fire, etc. Yes, fuses or breakers can blow, but not before the above mentioned can happen. 15A needs to flow before the fuse blows. What if it's not a hard short, but only 10A flow? The breaker will not trip. Something will get awful hot.
This scenario will not happen in an unbonded system. Not with one fault. There are no equipment loss, deaths, fire or what ever.
Sal
Sal-
What is a soft short?
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Salvo
California
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What if you got a rusty nail that's shorting the hot cable to chassis. Due to the nail's oxidation, the shorting resistance may be in the order of 12 ohms. It's not a hard short as it won't trigger the 15A breaker.
Sal
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ol Bombero-JC
USA
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Joined: 06/24/2004
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Holy Mackel Andy !!
In the second post old guy was pulling "our" chain/s . . . .
then the "pros" entered the discussion hosting each others petards . . . .
and the "average Joe" is scratching his dandruff while mumbling, Huh?? 
Ya'all need to step in front of a mirror and pat yourselves on the back,
and say, "Well done, self!"
Not only that - it was accomplished in "only" six pages!
~
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