| I am installing a computer equipment rack in my home office. The Power
| strip (PDU) that I want to use is the Geist VRTDN200-10310TL. It
| terminates in a NEMA L5-30P. The specs on the PDU are 30 Amps, 125V,
| 3750 Watts, 2 x 15 Amp circuits, 2 15 Amp internal circuit breakers,
| 10 duplex recepticles per circuit (total of 20).
| Here is a link to the PDU's specs:
| The question is: do I need to install a 2 pole 30 Amp breaker or a
| single pole 30 Amp circuit? The specs on the PDU are 125V but the
| cable is 10/3 and the connector is L5-30P. Isn't that a 2 pole
| configuration? If I need a single pole configuration, how do I wire
| the L5-30R?
A NEMA L5-30P is a plug for a SINGLE POLE 125 volt 30 amp circuit.
So your breaker would be ONE pole 30 amp, and the wiring would be a
AWG 10 or larger (smaller number). If wired in conduit or cabled in
metallic, the wires will have colors green, black, and white. If in
non-mettalic cable, the ground wire will most likely be bare instead
The L5-30R will have connections for ground (connect with the green or
bare wire), hot/live (connect with the black wire), and neutral (connect
with the white wire).
The designation "10/3" is an example of where someone counts the ground.
This is a common source of ambiguity. Find out what insulation colors
those wires have to tell you the circuit type.
If wiring in metallic conduit/cable, it might be wise to go with an
"isolated ground" circuit. To do this you need a receptacle that has
a specific isolated ground capability (no connection between the ground
pin and the frame). The wires will include a 2nd ground wire colored
with a green/yellow stripe. This allows grounding the frame and metal
conduit separately from the receptacle ground pin (but they still meet
at the circuit source in the breaker box).
| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
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