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Site Survey Worksheet: Dell™ PowerEdge™ 42-U Rack and 24-U Rack Site Planning Guide

	Unloading, Receiving, and Moving Your Equipment		Electrical Requirements
	Physical Characteristics of the Site		Safety Considerations
	Air-Conditioning and Lighting Requirements

Unloading, Receiving, and Moving Your Equipment

Ensure that you have the following unloading, receiving, and moving equipment available:

• A loading dock
  
  

  NOTE: If no loading dock is available, inside delivery service will be added to your order so that your rack can be unloaded. If a loading dock is available but you do not specify inside delivery service, the rack will be delivered only as far as the loading dock.

• A ramp or elevator for transferring the rack from the loading dock to the interior of the building

• The following tools may be required for unpacking your rack:
  
  
  • A pallet jack or forklift to move the rack pallet
    
    
  • An adjustable wrench to take the rack off the pallet

• The following tools may be required for installing your rack:
  
  
  • A 3/8-inch nut driver
    
    
  • A 3/8-inch wrench
    
    
  • A 7/16-inch wrench
    
    
  • A 1/2-inch wrench or socket with driver
    
    
  • A #2 Phillips screwdriver
    
    
  • A steel measuring tape

Ensure that the delivery path for the rack meets the following conditions:

• 284.5 centimeters (cm) (9.33 feet [ft]) of space to extend the wooden ramp (included in the rack packaging) and off-load the rack from the pallet
  
  
• No stairways or doors with saddles or sills

For a Dell PowerEdge 42-unit (U) rack:

• Clearance is 91.4 cm (3 ft) wide by 231 cm (7.58 ft) high for a rack with a pallet
  
  
• Clearance is 81.3 cm (2.67 ft) wide by 214 cm (7.02 ft) high for a rack without a pallet

For a Dell PowerEdge 4210 42-unit (U) rack:

• Clearance is 80.65 cm (2.65 ft) wide by 218.4 cm (7.17 ft) high for a rack with a pallet
  
  
• Clearance is 60.2 cm (1.96 ft) wide by 199.6 cm (6.55 ft) high for a rack without a pallet

For a Dell PowerEdge 24-U rack:

• Clearance is 91.4 cm (3 ft) wide by 168 cm (5.50 ft) high for a rack with a pallet
  
  
• Clearance is 81.3 cm (2.67 ft) wide by 153 cm (5.00 ft) high for a rack without a pallet
  
  

NOTE: If your site does not meet the delivery path requirements, you need to remove the rack from the pallet and have two people available to tilt the rack.

Ensure that two people are available to remove the rack from the pallet.

Physical Characteristics of the Site

NOTE: The following floor plan and ceiling measurements are Dell specifications. You may need to amend them for compliance with local ordinances.

Ensure that the floor plan provides for the following space requirements:

• At least 30.5 cm (1 ft) in front and back of the rack when the rack is operational
  
  
• At least 61.0 cm (2 ft) in front and back of the rack for servicing the equipment in the rack; a total of 165 cm (5.42 ft) when the shelves are extended
  
  
• Adequate storage space for computer supplies
  
  
• Workspace for the system administrator (desk with console)
  
  
• Adequate room for maintenance of equipment
  
  
• Room for adding equipment when upgrades are needed (optional)
  

For a 42-U rack or a 4210 42-U rack, check that the ceiling height is at least 2.74 meters (m) (9 ft) high. For a 24-U rack, the ceiling should be at least 1.83 m (6 ft) high.

Raised computer floors should meet the following conditions:

• For a 42-U rack, the floor should support 1587 kilograms per square meter (kg/sq m) (325 pounds per square foot [lb/sq ft]) with a concentrated load of 1587 kg/sq m (325 lb/sq ft). For a 4210 42-U rack, the floor should support 2193 kg/sq m (450 lb/sq ft) with a concentrated load of 2193 kg/sq m (450 lb/sq ft).
  
  For a 24-U rack, the floor should support 493 kg/sq m (101 lb/sq ft) with a concentrated load of 493 kg/sq m (101 lb/sq ft).
  
  
• The floor is well-grounded.
  
  
• Carpeted floors are antistatic.
  
  
• No heavy equipment or magnetic fields are in the vicinity of the site.
  
  
• Cabling has been planned or installed.
  
  
• All equipment has adequate cable length.
  
  
• The site is relatively clean and free from airborne particles that can affect performance.

Air-Conditioning and Lighting Requirements

Before installing the rack system, estimate the heat dissipation of the proposed rack system (your Dell sales representative can provide you with specifications for system components).

The air-conditioning in the computer room should meet the following conditions:

• Operating temperature must not exceed the range of 10° to 35° Celsius (C) (50° to 95° Fahrenheit [F]) in the immediate vicinity of the racks.
  
  
• Operating noncondensing humidity levels must be maintained at 8 percent to 80 percent.

• Lighting should be adequate for servicing the equipment.
  

Electrical Requirements

The rack system should not  be connected to an AC power source that is also being used by industrial equipment such as electric motors, welders, elevators, copiers, or large monitors.

Use a line analyzer to check AC power for the following measurements:

• Voltage variations
  
  
• Transient spikes

An AC outlet that accommodates locking plugs should be available for each locking-plug power distribution unit (PDU) or APC 3000 RM uninterruptible power supply (UPS)ordered.

NOTE: If no room-wide UPS exists, Dell recommends that you have every server running from a UPS mounted in each rack enclosure.

The site should have the appropriate AC power connections:

• In areas served by 115 volts (V)/60 hertz (Hz) power (most of North and South America and some Far Eastern countries), Dell recommends that you:
  
  
  • Use the L5-20P locking plug on a power distribution unit or the L5-30P locking plug for the APC 3000 RM UPS to connect the rack system to an AC power source. Do not bypass the locking plug by connecting power cables from any individual components in the rack to an AC power source directly. Contact Dell if you have questions regarding the correct locking plug for your region.
    
    

    WARNING: Connecting any power cable other than a cable with a locking plug to an AC power source can cause a high shock hazard and can cause personal injury.

  • Use at least one dedicated service outlet for every two servers installed in the rack.
    
    

    NOTE: If AC redundancy is desired, the outlets should come from different sources.

  • Use one 20-ampere (A) dedicated service outlet for each APC 1400 RM UPS or APC 2200 RM UPS.
    
    
  • Use one 30-A dedicated service outlet for each APC 3000 RM UPS.
    
    

• In areas served by 208 V/220V 60 Hz power (most of North and South America and some Far Eastern countries), for systems and power distribution units that use 208 V/220V 60 Hz power, Dell recommends the following:
  
  
  • Use the L6-30P locking plug on a PDU or an APC 3000 RM UPS to connect the rack system to an AC power source. Do not bypass the L6-30P locking plug by connecting power cables from individual components in the rack directly to an AC power source. Contact Dell if you have questions regarding the correct locking plug for your region.
    
    

    WARNING: Connecting any power cable other than the cable with a locking plug to an AC power source can cause a high shock hazard and can cause personal injury.

  • Use at least one dedicated service outlet for every PDU installed in the rack.
    
    

    NOTE: If AC redundancy is desired, the outlets should come from different sources.

  • Use one 30-A dedicated service outlet for each APC 3000 RM UPS.
    
    
• In areas served by 230 V/50 Hz power (most of Europe, the Middle East, and the Far East), the rack uses a power distribution unit. The power distribution unit must be wired to the site's power, or an International Electrotechnical Commission (IEC) 309-type industrial locking power plug must be used that meets appropriate local safety requirements. A qualified electrician should perform preparation and configuration of power systems. The power input cable requirements for the power distribution unit are as follows:
  
  
  • For sites that employ single-phase 60-A power, use a 3-wire power input cable with a maximum individual wire size of 4 gauge. The cable must be capable of handling 60 A.
    
    
  • For sites that employ single-phase 30-A power, use 3-wire power input cables capable of handling 30 A.
    
    
  • For sites that employ single-phase 20-A power, use 3-wire power input cables capable of handling 20 A.

• The earth ground is in the range of 2 to 5 ohms.
  
  
• The present ground has been measured to ensure that it is not conducting any current due to neutral-to-ground shorts, reversals, or other problems.

Safety Considerations

Ensure that the site complies with the following local codes and regulations:

• Building codes
  
  
• Fire codes
  
  
• Electrical codes
  
  
• Insurance regulations
  
  
• Fire detection
  
  
• Fire extinguishers (carbon dioxide or halon is recommended)
  
  
• Approved evacuation plan
  
  
• Fireproof cabinets for storage of flammable material (such as printer paper)

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