So, regarding 230v actuators, would you terminate it in a switched fused spur or an unswitched fused spur?
So, regarding 230v actuators, would you terminate it in a switched fused spur or an unswitched fused spur?
A smoke damper has to operate if the power fails, so if its 230v with no battery back up supply it should be spring or gravity closing to fail "safe". In which case it wouldn't really matter what isolation or fuse protection is installed so long as it can be safely isolated for maintenance.
regards burn
A smoke damper has to operate if the power fails, so if its 230v with no battery back up supply it should be spring or gravity closing to fail "safe". In which case it wouldn't really matter what isolation or fuse protection is installed so long as it can be safely isolated for maintenance.
I'm sure that's not always the case ... for example with smoke control or "positive pressurisation" systems, a "fail to close" might be just as bad as "fail to open".
A smoke damper has to operate if the power fails, so if its 230v with no battery back up supply it should be spring or gravity closing to fail "safe". In which case it wouldn't really matter what isolation or fuse protection is installed so long as it can be safely isolated for maintenance.
I'm sure that's not always the case ... for example with smoke control or "positive pressurisation" systems, a "fail to close" might be just as bad as "fail to open".
From the original description I didn't think that was the case here
I agree that's probably the case, but the original question is rather brief and devoid of context.
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