Installation
49
3. Tighten the screws securing the clamp
. Torque the screws using 2 to 4 inch-pounds (0.23 to 0.45 Newton meters).
4. Insert the power cord with the cable clamp into one of the two openings on the safety cover. (The figure shows the
power cord installed in the bottom opening.) Tighten the lock nut
and the cable clamp to the safety cover.
Make sure that the cable clamp is securely fastened to the safety cover.
5. Remove the insulation from the pre-striped end of the three ac lines. Secure the lines in the top of each fuse holder as
follows: Phase 1
to L1. Phase 2
to L2. Phase 3 to L3.
Torque the conductive clamp screws to 35 inch-pounds (4 Newton meters).
Pull up on the wire to check that it is securely fastened and cannot pull out.
6. Secure the ground wire
to the chassis earth ground stud.
Torque the stud nut to 35 inch-pounds (4 Newton meters).
7. Position the safety cover over the fuses and secure the cover with the cover screws. Torque the screws using 10 to 12
inch-pounds (1.13 to 1.36 Newton meters).
8. Place the metal cap
into the opening of the safety cover that is not being used by the line cord.
9. IMPORTANT To prevent the cable clamp
from becoming loose, attach the supplied cable mount to the side
of the safety cover as shown. If you are rack mounting the instrument, you could chose to attach the cable mount to the
side of the rack. Secure the power cord to the safety cover using the cable tie
. Position the cable tie on the power
cord so that it is about 12 inches (30 cm) away from the end of the cable clamp
.
10. Attach the appropriate power plug to the other end of the power cord.
Do not apply power to the instrument unless the safety cover is in place.
Note If you are providing your own power cable, remember to position the insulating sheath over the end
of the cable where it passes through the cable clamp .
Figure 2-6. Connecting the Series 669xA Power Cord
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