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Topic Title: Bus-Bar Chamber Topic Summary: Does it need overload protection? Created On: 16 September 2012 09:00 PM Status: Post and Reply |
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 16 September 2012 09:00 PM
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I recently visited a a joiners workshop (about 30 machines). There is a 100A / 300mA RCD protecting the whole installation.
The RCD also acts as a main switch as it feeds the 100A main bus-bar chamber but there is no overload protection. Surely overload protection is required? Bruno |
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16 September 2012 09:21 PM
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What does the busbar feed ?
Stu |
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 16 September 2012 09:23 PM
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I'd agree - but overload protection can be provided in a number of ways... does the supplier's fuse give protection? (like for the bus-bar in a domestic CU?) does the nature of the load(s) or downstream devices provide overload protection? - Andy. |
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16 September 2012 09:29 PM
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How many metres away from the cutout is the busbar chamber?
------------------------- ---------------------------------------- Lack of planning on your part doesn't make it an emergency on mine.... Every man has to know his limitations- Dirty Harry |
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16 September 2012 10:00 PM
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What does the busbar feed ? Stu The busbar feeds several switch fuses, which inturn supply distribution circuits to distribution boards |
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16 September 2012 10:02 PM
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How many metres away from the cutout is the busbar chamber? Less than 2 meters |
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16 September 2012 10:04 PM
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Double insulated tails or singles in galv trunking. Old school but its ok.
------------------------- ---------------------------------------- Lack of planning on your part doesn't make it an emergency on mine.... Every man has to know his limitations- Dirty Harry |
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