DS8000 Service Documentation Version 7.5

Routing the mainline power cables

Before you begin

Repeat the following steps for each rack that you are installing.

Attention: YOU MUST USE ONLY MODEL 961, 96E MAINLINE POWER CABLES.
Prior model mainline power cables can damage the 961, 96E DC-UPS even though the cables may look identical.

Procedure

Do not connect the storage facility mainline power cables to customer power until instructed in a later installation section
Was the rack ordered with a top exit line cord feature?
- Yes, go to step 9.
- No, go to step 3.

The mainline power cable that connects to the upper DC-UPS (Un-E1) Callout label 1

is longer than the mainline power cable that connects to the lower DC-UPS (Un-E2) Callout label 2

. See Figure 1. Use the cable label and part number (P/N) to identify the longer cable.

Table 1. Cable label and part number for standard bottom exit feature
Feature Code	P/N of shorter cable (Lower DC-UPS)	P/N of longer cable (Upper DC-UPS)
1080 - Three-phase high voltage (five-wire 3P+N+G), 380 - 415 V, 30A, IEC 60309 5-pin customer connector	98Y4283	98Y4284
1081 - Three-phase high voltage (five-wire 3P+N+G), 380 - 415 V, 32A, no customer connector provided	98Y3729	98Y3730
1082 - Three-phase low voltage (four-wire 3P+G), 200 - 240 V, 60A, IEC 60309 4-pin customer connector	98Y3725	98Y3726
1061 - Single-phase (three wire 2P+G), 200-240V, 60A, IEC 60309 3-pin customer connector	98Y3733	98Y3734
1068 - Single-phase (three wire P+N+G), 200-240V, 63A, no customer connector provided	98Y3737	98Y3738

Figure 1. Mainline power cables (Model 96x)

Ensure the PDUs are in the open position. See Figure 1.
If you are installing Rack-3 or Rack-4, at the rear of the rack remove the tailgate plate. See Figure 2.
1. Remove two left screws .
2. Loosen but do not remove two rear screws .
3. Remove tailgate plate .
Figure 2. Rack-3 or Rack-4 tailgate plate
Route and connect the mainline power cables to the DC-UPS in the racks being installed. See Figure 1.
1. Route the longer mainline power cable up through the tailgate and connect it to the upper DC-UPS . Ensure it stays fully to the left to not block access to the lower DC-UPS.
2. Route the shorter mainline power cable up through the tailgate and connect it to the lower DC-UPS .
Notes:
- If this is on a raised floor, route the cables down through the floor cutout and near the customer power connectors.
- If this is not on a raised floor, route the cables underneath the frame behind the rear caster so they exit to the side. The cables must not exit the rack in the front or rear service areas.
For Rack-3, Rack-4, or both, reinstall the tailgate plate.
Go to Determining mainline power cable type (plug in or wired).

For the top exit line cord features, the mainline power cable that connects to the lower DC-UPS Callout label 2

is longer than the mainline power cable that connects to DC-UPS (upper) Callout label 1

. See Figure 1. Use the cable label and part number (P/N) to identify the longer cable.

Table 2. Cable label and part number (top exit line cord)
Feature Code	P/N of shorter cable (Upper DC-UPS)	P/N of longer cable (Lower DC-UPS)
1083 - Three-phase high voltage (five-wire 3P+N+G), 380 - 415 V, 32A, no customer connector provided	98Y3732	98Y3731
1084 - Three-phase low voltage (four-wire 3P+G), 200 - 240 V, 60A, IEC 60309 4-pin customer connector	98Y3728	98Y3727
1085 - Three-phase high voltage (five-wire 3P+N+G), 380 - 415 V, 30A, IEC 60309 5-pin customer connector	98Y4286	98Y4285
1072 - Single-phase (three wire 2P+G), 200-240V, 60A, IEC 60309 3-pin customer connector	98Y3736	98Y3735
1073 - Single-phase (three wire P+N+G), 200-240V, 63A, no customer connector provided	98Y3740	98Y3739

Ensure the PDUs are in the open position. See Figure 1.
Remove the top exit cover plate.
1. Remove the four screws securing the cover plate to the top of the rack. Remove the cover plate. See Figure 3.
2. Reinstall the screw nearest the rear of the rack. See Figure 3. Save the remaining screws to install the clamp housing.
3. Store the cover plate in the document enclosure at the upper front left of the rack.
  Figure 3. Removing top exit line cord cover plate
Route and connect the mainline power cables to the DC-UPS in the racks being installed. See Figure 4.
1. Route the longer mainline power cable down through the opening and connect it to the lower DC-UPS . Ensure the routing stays fully to the left to allow service access to the upper DC-UPS.
2. Route the shorter mainline power cable down through the top opening and connect it to the upper DC-UPS .
3. The upper DC-UPS main line power cable must be routed to the right of the lower DC-UPS main line power cable .
  Note: This ensures there is enough room for the PDUs to close fully.
4. Pull both main line power cables down an extra 15 cm (5 inches). This will create extra slack (S-curve) so that the cables can be moved as needed for service access to FRUs.
  Figure 4. Model 961, 96E top exit main line power cables to DC-UPS
Install the top exit mainline cable clamp housing.
1. Remove the adjustable clamp bracket from the top exit line mainline cable housing .
2. Position the housing around the two cables and secure to the rack using the three screws removed in a prior step.
3. Install the adjustable clamp bracket into the housing. Tighten it enough to prevent the cables from slipping, but do not over tighten. See Figure 5.
  Figure 5. Top exit line cord clamp
Go to Determining mainline power cable type (plug in or wired).