Seano Posted September 21, 2011 Share Posted September 21, 2011 A proper violation in the theatre industry is the way a yellow Cee form is used with hoists.Even after the migration to 4-pin? Link to comment Share on other sites More sharing options...
Matthew Robinson Posted September 21, 2011 Share Posted September 21, 2011 As per IEC 60309, shouldn't they be grey? (My thinking here being that grey is uncommon, designed as a catch all and thus useful for control). I must admit to not knowing the control voltage of truss motors, but if they fit within 100-130v, 50-60Hz that usage is technically correct? Link to comment Share on other sites More sharing options...
bigclive Posted September 22, 2011 Share Posted September 22, 2011 A proper violation in the theatre industry is the way a yellow Cee form is used with hoists.Even after the migration to 4-pin? You still find the standard 3-pin in "legacy" installations. In the most common application of the three pin version (site 110V supplies) the 110V was centre referenced to ground giving two 55V phases. I'm not sure who originally came up with the idea of using the earth pin as 110V control feed in the first place. They do deserve special mention though. It's right up there with the manufacturers of cheap smoke machines using the earth pin of a standard euro connector as a mains control line. Link to comment Share on other sites More sharing options...
Seano Posted September 22, 2011 Share Posted September 22, 2011 You still find the standard 3-pin in "legacy" installations.Indeed, though they're not common. You certainly won't find a CM fitted with one on sale or for hire from any reputable supplier.If the motors in a 'legacy' installation are powered up while they're not in use, I'd be more concerned about that than anything to do with the cee-forms tbh. I wasn't trying to make a point, btw, genuinely wasn't sure if you were talking about 'then' or 'now'. I don't think there was a single recorded case of anyone managing to hurt themselves while the 3-pin cee-forms were ubiquitous was there? FWIW I tended to the view that anyone daft enough to plug a power tool into an active CM Lodestar was always going to find *some* way to hurt themselves. Incidentally I work with one such 'legacy' installation fairly regularly and it'd definitely take a *very* determined idiot to contrive a belt for themselves out of that. They'd have to pass up several much easier and more interesting ways to kill themselves along the way. It's right up there with the manufacturers of cheap smoke machines using the earth pin of a standard euro connector as a mains control line.Teensy bit harsh perhaps. You fully expect cheap smoke machines to fall into the hands of idiots, they're a fair chunk of the 'cheap smoke machine' market.CM Lodestars (and indeed 110v power tools) being used by numpties is probably best avoided regardless what connectors are on them. ;) Link to comment Share on other sites More sharing options...
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