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SECTION 4: DESIGNING THE
SYSTEM
General
Duct Material
You have many choices regarding main line and
branch line duct material. For best results, use
metal duct for the main line and branch lines, then
use short lengths of flexible hose to connect each
machine to the branch lines.
Plastic duct is also a popular material for home
shops. However, be aware that there is a fire or
explosion hazard if plastic duct material is used
for dust collection without being grounded against
static electrical charge build-up. This topic will be
discussed later in this section. Another problem
with using plastic is that it is less efficient per foot
than metal.
Plastic duct generates static
electrical buildup that can
cause fire or shock. Properly
ground it to reduce this risk.
Plastic Duct
Figure 32.
Dust Collection Basics.
Always guard against stat-
ic electrical build up by
grounding all dust collec-
tion lines.