© 2020 ASCO Power Technologies. All Rights Reserved
For access to self-service tools and chat support visit se.com/us/en/work/support or call 1-888-778-2733 for technical assistance
15
IO-70067
01/2020
ASCO 360 Surge Protective Device (SPD)
Preventive Maintenance
UL 1283 Required Language
concerning the installation
of EMI Filters
Connecting Optional Form C
Dry Contact
a. An insulated grounding conductor that is identical in size and insulation
material and thickness to the grounded and ungrounded circuit supply
conductors except that it is green with or without one of more yellow
stripes, is to be installed as part of the circuit that supplies the filter.
Reference NEC Table 250-122 for the appropriate size of the grounding
conductor
b. The grounding conductor mentioned in item a is to be grounded at the
service equipment or other acceptable building ground such as the
building frame in the case of a high-rise steel frame structure.
c.
Any attachment-plug receptacles in the vicinity of the filter are to be
of a grounding type, and the grounding conductors serving these
receptacles are to be connected to ground at the service equipment or
other acceptable building ground such as the building frame in the case
of a high-rise steel-frame structure.
d. Pressure terminal or pressure splicing connectors and soldering lugs
used in the installation of the filter shall be identified as being suitable
for the material of the conductors. Conductors of dissimilar metals shall
not be intermixed in a terminal or splicing connector where physical
contact occurs between dissimilar conductors unless the device is
identified for the purpose and conditions of use.
Three 3 ft. (~1 m) 18 AWG wires are included through the nipple with this
option. See figure below. Gray is Common, Blue is Normally Open and Red
is Normally Closed when energized in its expected installation. (When not
energized, the SPD is no longer in its ‘Normal’ state and contacts will be
reversed.)
Dry contact
leads
(18 AWG)
Power leads
(10 AWG)
Blue
Gray
Red
Form C dry contact: Three (3) #18 wires exit the hub
- Gray is common
- Blue is normally closed
- Red is normally open
• For normally closed: Use gray and blue
• For normally open: Use Gray and Red
