Marking and Labeling Requirements

DOE-HDBK-1092-2004

9.8

MARKING AND LABELING REQUIREMENTS

9.8.1

GENERAL MARKING REQUIREMENTS

For all chassis and rack cabinets (electrical, computer, power distribution, etc.), the

manufacturer's name, trademark, or other descriptive marking of the organization responsible

for the product should be identified.

Other markings for power requirements are:

1. Voltage

2. Maximum rated current in amperes

3. Wattage

5. Duration

6. Duty cycle

7. Other ratings as specified in the NEC (NEC 110.21)

9.8.2

HAZARD MARKING REQUIREMENTS

All enclosures containing exposed energized circuits over 600 volts nominal should be marked

"Danger High Voltage Keep Out" with a label that is permanent. These areas shall be

accessible to authorized personnel only. The label shall be placed in a noticeable location on

the access panel to the enclosure. Mark all other hazards that are associated with the

equipment.

9.8.3

OTHER REQUIREMENTS

All equipment markings shall be of sufficient durability to withstand the environment involved

and should be large enough to read.

To obtain the correct chassis load requirements for marking and labeling, monitor individual

chassis while under load. Many chassis have components that are not energized except under

certain conditions.

A normal current draw may be a few amperes, but when the chassis is sourcing current to a

load, the current draw may be much higher. Individual loads, internal and external, may be

tabulated and added to determine the chassis current labeling requirements.

For rack cabinets with power distribution units, the outside of the rack cabinet should be labeled

with the input parameters of the power distribution system installed within it.

For rack cabinets without power distribution units the outside of the rack cabinet should be

labeled with the total current on the combined systems installed within it.

9-13