Power Cord Installation
SHOCK HAZARD The instrument requires a chassis ground connection through a
separate conductor. The AC mains must include an earth ground connection.
AC mains connections must be made by a qualified electrician who knows about 3-
phase mains circuits and all applicable safety standards and requirements.
l If attached, remove the safety cover from
the unit.
l Insert the terminated ends of the power
cord through the strain relief of the safety
cover. The safety cover strain relief is
designed to accommodate both a wire
cable, or individual wires.
l Do not tighten the strain relief until all
wire connections are complete.
l Attach the safety cove to the unit.
l Attach the ring-terminated line wires to the AC
mains terminals (U.S. color code shown). The bolt
diameter is M5.
Place the ring terminals between the star washers.
Connect the ground wire to the chassis stud below
the AC line filter assembly.
If provided, do not connect the neutral wire.
l Tighten the terminal bolts to 23 in-lb (2.6 Nm).
l Note that on earlier units, the AC mains terminals
have hex-nut terminal connections.
Ferrite Core Installation - for earlier RP7961A, RP7962A, RP7963A models
For 400/480 VAC input units that have hex-nut
terminal connections (not bolts), install a ferrite
core (p/n 9170-2578) to reduce RFI interference.
Place the core as close as possible to the input
cover as shown.
Place a tie-wrap behind the core to prevent it
from sliding down the power cord.
Keysight RP7900 Series Operating and Service Guide 67
2 Installing the Instrument
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