Re: Oil Refinery

["Robert L Bass" <RobertLBass@xxxxxxxxxxx>]

> As a rule we always consider ALL wire runs as plenum
> unless PROVEN otherwise (meaning okay for PVC).
> There are too many times when a wire run starts out
> as a non plenum, but before it reaches the target it
> goes through a return air or similar area.

Any time we installed in an office or store front location,
we would check first.  During construction there are
invariably a set of prints.  A couple of minutes spent
looking at what others are doing will go a long way
toward protecting your own work.

At times when working for the owner or tennant and a
GC is doing the construction, the client won't not even
know what a plenum is, let alone whether his ceiling
space is one.  If the HVAC ducts are already in place
when you begin your wiring (and they really should be
since HVAC guys will cut any wires that happen to be
in their way), just look at the setup.  If there's only
one set of ducts feeding the area, the ceiling will likely
be a plenum.

In a competitive market you don't need to load your
bid down with plenum cable if it's not called for.

Also, someone said he gets the client to sign off on
using non-plenum cable.  That's no protection for the
installer.  The customer is not the arbiter of code.

--

Regards,
Robert L Bass

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