It does not appear to be an issue. One normally runs a wire along with
the pipe anyway as it is part of the switch on the outlet setup that
automatically turns on the vacuum unit when one inserts the hose end
into the outlet. If there was a need for grounding, one would think they
would provide a bare wire to run along with the low voltage switch
wiring for the unit. We installed ours in about 1983 and apart from
having one obstruction years back when the kids were little and playing
with toys, and one change of motor in the unit last year, it has been
fairly flawless. We did have to replace the carpet sweeper unit once
too. Ours is the type powered by the airflow and not an electric unit
with a cord. We added on to the house in 1987 and I tapped into the
existing system to provide a couple more outlets and that was fairly
easy too.
Randy
On 07/12/2010 4:52 PM, Rich Thomas wrote:
You have to be careful with the PVC,(I'm not sure about other types of
plastic) because it can build up a pretty (like REALLY) high static
charge when stuff is flowing through it. Some people have used it for
pipe in a central shop vac system, and have found that running a bare
wire (like 14g electrical) along it (outside) and to a ground, taped
down with the aluminum tape, helps keep the charge down, which could
cause sparks and mayhem in a dusty environment. I even notice that in
my roll-around shop vac when using a couple of hoses joined together,
in the winter when it's dry you can get a nice ZAP!!!! off the thing.
I don't know if that house vac stuff considers that aspect or not.
--R
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