Atmospheric Single-Arm Robot Safety
User’s Manual Electrical Hazards
Brooks Automation
Revision 1
2-19
need to conduct testing or maintenance on subsystems that may be energized. Cali-
brations and adjustments are performed with the power on and live circuits covered.
No equipment should ever be repaired or replaced with the power on.
Table 2-2: Electrical Hazard Classifications
Classification Description
Type 1 Equipment if fully de-energized.
Type 2 Equipment is energized. Energized circuits are covered or insu-
lated.
Type 3 Equipment is energized. Energized circuits are exposed and inad-
vertent contact with uninsulated energized parts is possible.
Potential exposures are no greater than 30 volts RMS, 42.2 volts
peak; 60 volts DC or 240 volt-amps in dry locations.
Type 4 Equipment is energized. Energized circuits are exposed and
inadvertent contact with uninsulated energized parts is possible.
Potential exposures are greater than 30 volts RMS, 42.4 volts peak,
60 volts DC, or 240 volt-amps in dry locations.
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