Some of you may not recognize what that hole is.
That hole lets HVAC air pass through a fire wall, however the metal duct is a fire damper.
It is held up by pieces of easily melted metal, during a fire it is supposed to drop down and seal off the hole.
It only drops by gravity and the wires passing through will hold it open.
This may seem minor but it is not, smoke is the biggest killer in a fire, this damper was put in for a definite purpose.
IMO running wires through that hole is no different then disabling sprinklers or smoke detectors, it could very well cause death.
[This message has been edited by iwire (edited 12-19-2004).]