Current in the Run
When calculating voltage drop manually, the designer must
determine the current in each run (that is, from the last light
pole to the next-to-last, etc., all the way back to the service
pole). The current depends on the number and type of fixtures. The
following table shows the current required for the various types
of fixtures.
Luminaire Wattage and Type* | — Line Voltage — | |||
|---|---|---|---|---|
120 V | 240 V | 480
V | ||
150W HPS
|
1.67 A
|
0.83 A
|
0.42
A
| |
250W HPS
|
2.50 A
|
1.25 A
|
0.63
A
| |
400W HPS
|
3.75 A
|
1.88 A
|
0.94
A
| |
150 W EQ LED
|
0.83 A
|
0.42 A
|
0.21
A
| |
250W EQ LED
|
1.42 A
|
0.71 A
|
0.35
A
| |
400W EQ LED
|
2.08 A
|
1.04 A
|
0.52
A
| |
12-400 W HPS HM
|
45.0 A
|
22.5 A
|
11.3
A
| |
6-400W LED HM
|
30.0 A
|
15.0 A
|
7.50
A
| |
150 or 165 W IF | 1.4 A | 0.71 A | n/a | |
*HPS
= High Pressure Sodium; LED = Light Emitting Diode; IF = Induction
Fluorescent; HM = High Mast
| ||||