Chassis Grounding Issues:
The Metal chassis should be effectively bonded to a main grounding point in the rack cabinet where
necessary to assure electrical continuity and shall have the capacity to conduct safely any fault
current likely to be imposed on it. See Ground Lug Manufacturers
In a chassis with ac service connected to it, the grounding terminal of its receptacle shall be internally bonded to the chassis frame. If solder is used, the connection of the equipment grounding conductor shall not depend on solder alone.
Input/output ac power connections to the chassis shall comply with NEC requirements.
The exposed, non-current carrying, metal parts of panel mount connectors operating at 50 volts or
greater shall be bonded to the chassis.
Plugs and sockets for connecting any AC power source shall be NRTL [Nationally Recognized Testing Laboratory] approved for the application.
AC power sockets and plugs shall not be used for purposes other than the connection of AC power.
Connectors operating at 50 V or greater shall be rated or recommended for their intended use.
Any connector used to provide power at 50 V or greater shall not allow personnel to make inadvertent
contact with the power source.
If plug pins of cord-connected equipment receive a charge from an internal capacitor, the pins shall
not be capable of rendering an electric shock or electric burn in the normal or the single fault condition
5 seconds after disconnection of the supply.
Plug-in type connectors intended to be connected and disconnected by hand shall be designed so that
the grounding conductor connection makes first and breaks last with respect to the other connections.
All terminals and live parts with a potential of 50 volts or greater shall be guarded to protect from
accidental contact or bringing conductive objects in contact with them.
All Equipment Enclosures containing exposed energized circuits over 600 volts nominal should be marked
Danger High Voltage Keep Out with a label that is permanent.
Index page; How To Specify a Equipment Chassis
