UL 1283 required language concerning the installation of EMI Filters
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
or more yellow stripes, is to be installed as part of the circuit that
supplies the filter. Reference should be made to Table 250-122 of
the National Electrical Code regarding the appropriate size of the
grounding conductor.
b) The grounding conductor mentioned in item a is to be grounded
to earth at the service equipment or other acceptable building earth
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 earth ground at the service
equipment or other acceptable building earth 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.
Additional instructions for TPS3 01 & L1 SPDs including:
W option Suffix:
The W option includes respositioned phase connection tabs that allow
for wire connections to a circuit breaker within the panelboard. This
differs from non-W models, which bolts directly to bus bars.
The circuit breaker serves as a disconnector device and overcurrent
protection to the connecting conductors. The TPS3 SPD includes
internal overcurrent and overtemperature protective equipment. The
breaker does not provide overcurrent protection to the SPD.
Recommended breaker and conductor size is 60A with a 6 AWG
conductors. Other combinations are possible. Terminal lugs will
accept 2-14 AWG. Breaker size should be at least 20A. All applicable
codes must be followed.
Circuit breaker MUST be located immediately adjacent to SPD to
minimize lead lengths. Move or adjust breaker positions as appropriate.
Every effort must be taken to reduce lead lengths. Failure to install
short leads will degrade SPD performance.
Install appropriate circuit breaker in panelboard.
Prior to installing SPD, rotate and tighten lug terminals toward breaker
location.
Mount the SPD using supplied hardware.
Connect the neutral connection by wire or bracket as appropriate.
Install conductors, short and straight as possible. Use gentle radius
on any bends. Do not kink wires. Prevent wires from encroaching
breaker locations.
Torque all connections to the values specified on the installation and
maintenance instruction label affixed to the rear of the dead front.
Replace dead front supports and trim.
Energize breaker and confirm proper SPD operation.
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