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<blockquote data-quote="TJ Cornish" data-source="post: 35147" data-attributes="member: 162">Re: Cam lock power hummm / buzz....If it buzzes less at full load than an intermediate load, something more complicated than just buss induction is going on, so yes the dimmers are contributing to this.&nbsp; I&#039;m not sure if there&#039;s any easy or economical way to fix this (if it&#039;s even a problem).Some kind of external muffler may be your best solution, but I would be very careful how you implement that.&nbsp; Putting something flamable over electrical distribution equipment isn&#039;t going to be looked at kindly by the fire marshall.&nbsp; There are also access rules that apply to what can be in the way of the equipment.&nbsp; You&#039;re in Canada, so I won&#039;t presume to know all the ins and outs of this.&nbsp; In the US you have to have at least 36&quot; of clearance in front of panels, disconnects, etc.&nbsp; That could take the form of a shallow closet made of fire resistant materials (drywall, commercial door, etc.), or there may be some kind of metal enclosure that could be put over the existing equipment.&nbsp; The US NEC describes many of these things in article 110. <a href="http://www.nfpa.org/assets/files/PDF/ROP/70-A2010-ROPDraft.pdf" target="_blank">http://www.nfpa.org/assets/files/PDF/ROP/70-A2010-ROPDraft.pdf</a></blockquote>

[QUOTE="TJ Cornish, post: 35147, member: 162"] Re: Cam lock power hummm / buzz.... If it buzzes less at full load than an intermediate load, something more complicated than just buss induction is going on, so yes the dimmers are contributing to this. I'm not sure if there's any easy or economical way to fix this (if it's even a problem). Some kind of external muffler may be your best solution, but I would be very careful how you implement that. Putting something flamable over electrical distribution equipment isn't going to be looked at kindly by the fire marshall. There are also access rules that apply to what can be in the way of the equipment. You're in Canada, so I won't presume to know all the ins and outs of this. In the US you have to have at least 36" of clearance in front of panels, disconnects, etc. That could take the form of a shallow closet made of fire resistant materials (drywall, commercial door, etc.), or there may be some kind of metal enclosure that could be put over the existing equipment. The US NEC describes many of these things in article 110. [url]http://www.nfpa.org/assets/files/PDF/ROP/70-A2010-ROPDraft.pdf[/url] [/QUOTE]

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