Download Miller Electric SCE-1A Specifications

If the metallic
building is not properly grounded, bonding to
good electrical grounds placed around the periphery
of the building will give reasonable assurance that the build
9.
several
ing
itself is
contributing
not
to
the radiation.
10.
11.
Any
all
CERTIFICATION
INSTALLATION
7-9. INDIVIDUAL
the above installation requirements may be
user if he desires to exercise the option of
making an individual field survey of the particular unit instal
lation (or the complete installation if more than one unit is
involved), and certifying on that basis.
or
by
waived
of
tions Commission,
Surveys
units
or
of
this
nature
may include the
can
cover
a
unit
single
complete plant
or
multiple
equipment
secondary?
case connected to the
work terminal
Is the wire used for this connection of sufficient size?
Is
the work terminal connected to
good electrical
a
ground?
12.
the
This survey shall be made by a competent engineer in accord
ance with the test procedure requirements as set forth in Part
18 of the Rules and Regulations of the Federal Communica
Is the
of the
Is the cable or
equal
the
to
copperbraid used for this connection
current carrying capacity than
greater in
lead?
or
welding
13.
Is this cable
14,
Are the
spark-gaps
set at
.008
access
doors closed and bolted?
as
short
possible?
as
or
less?
15.
Are all service and
16.
Are the
17.
Are
18.
Are
the welding
suitable board?
19.
Are the
20.
Have you visualized the I-f.F.l. zone, a sphere with
foot radious centered on the weld zone?
21.
Have the unshielded power and light wires
originally in
this H.F.I. zone been placed in grounded shields or
been relocated outside the zone?
Have all large metallic objects and any lon9
guy
supporting wires in the H.F.I. zone been grounded?
welding
they
as
leads less then 25 feet
short
as
long?
possible?
structure.
leads
the
on
floor
or
placed
on
a
-
7-10. CHECK LIST
The following questions may be used by the installer as
check to see if all installation requirements have been met:
1.
Has the equipment been located
be kept short?
leads, serving the unit, in conduit?
2,
Are the power
3.
Is there good electrical contact between power
duit and case?
con
22,
4.
Do the conduit couplin~ make good electrical
tact? lIf in doubt, use bonding).
con
23.
Is there good electrical contact between conduit and
switch on service boxes?
6,
If
approximately 3/4
so
that
no
premises
are
1
to
apart?
a
50
Are the grounds driven ground rods?
25.
Is
26.
If so, does it
connection?
27.
Are the connections
28.
If operated within
properly grounded?
a
cold
water
pipe used
as
or
external power or tele
within the zone?
24.
ground?
metallic conduit is not used, is the
shielding
equivalent shielding efficiency? (Copper sleev
used of
lead covered cable, etc-, is satisfactory. Spirally
wound flexible metallic conduit is not suitable).
ing,
8,
Have you checked
lines off the
phone
5,
7.
leads
that ground leads
so
can
rigid
welding
a
Is the conduit system grounded at
feet from the equipment?
Is the conduit
NFl. zone?
run
a
point
complete (without
any
at least
gap)
50
in the
enter
the ground 10 feet
to
a
or
less from the
the ground clean and
metal
building,
If your answer is yes
to the above questions,
fy the installation by signing the certificate,
tight?
is the
you
building
can
certi
OM-540 Page 9