You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter Prototype1
- Start date

- Location
- Houston

- Occupation
- Noob EE

- Location
- Houston

- Occupation
- Noob EE

Pickleball court – Total Watts – **3,584 (8 lights) - 448 watts each light**

Tennis – Total Watts –**2,406 (6 lights) - 401 watts each light**

Trail Lights – Total Watts =**1170 Watts (26 Poles lights) - 45 watts each light**

Bollards – Total Watts =**760 Watts (20 Bollards lights) - 38 watts each light**

Disk Lights – Total Watts =**480 Watts (8 lights) - 60 watts each light**

3 circuits from the panel board. 1 going to the pickleball court and plaza lights. 1 going to the tennis court. 1 for the trail lights and bollards.

1st circuit:

Total wattage for the 1st circuit:

3584 watts + 480 watts = 4064 Watts

Apply the 80% continuous load factor.

4064 watts * 0.8 =**3251.2 watts**

# of lights: 3251.2 watts / (448 watts/light + 60 watts/light) ~ 6.57 lights

Rounded down: Approximately 6 Pickleball lights and 6 plaza lights.

2nd circuit:

Total wattage for the 2nd circuit:

2406 watts

Apply the 80% continuous load factor.

2406 watts * 0.8 =**1924.8 watts**

# of lights:1924.8 watts / (401 watts/light) ~ 4.80 lights

Rounded down: Approximately 4 tennis lights.

3rd circuit:

Total wattage for the 3rd circuit:

1170 watts + 760 watts = 1930 Watts

Apply the 80% continuous load factor.

1930 watts * 0.8 =**1544 watts**

# of lights: 1544 watts / (45 watts/light + 38 watts/light) ~ 20.96 lights

Rounded down: Approximately 20 lights (combining Trail lights and Bollard lights). We have total 46 lights trail + bollard lights.

P = I*E

1st circuit: 3521.2 W / 120 V = 29.34 A

2nd circuit: 1924.8 W / 120 V = 16.04 A

3rd circuit: 1544 W / 120 V = 12.87 A

29.34+16.04+12.87 = 58.25 A, and I can use 60 A panel.

Tennis – Total Watts –

Trail Lights – Total Watts =

Bollards – Total Watts =

Disk Lights – Total Watts =

3 circuits from the panel board. 1 going to the pickleball court and plaza lights. 1 going to the tennis court. 1 for the trail lights and bollards.

1st circuit:

Total wattage for the 1st circuit:

3584 watts + 480 watts = 4064 Watts

Apply the 80% continuous load factor.

4064 watts * 0.8 =

# of lights: 3251.2 watts / (448 watts/light + 60 watts/light) ~ 6.57 lights

Rounded down: Approximately 6 Pickleball lights and 6 plaza lights.

2nd circuit:

Total wattage for the 2nd circuit:

2406 watts

Apply the 80% continuous load factor.

2406 watts * 0.8 =

# of lights:1924.8 watts / (401 watts/light) ~ 4.80 lights

Rounded down: Approximately 4 tennis lights.

3rd circuit:

Total wattage for the 3rd circuit:

1170 watts + 760 watts = 1930 Watts

Apply the 80% continuous load factor.

1930 watts * 0.8 =

# of lights: 1544 watts / (45 watts/light + 38 watts/light) ~ 20.96 lights

Rounded down: Approximately 20 lights (combining Trail lights and Bollard lights). We have total 46 lights trail + bollard lights.

P = I*E

1st circuit: 3521.2 W / 120 V = 29.34 A

2nd circuit: 1924.8 W / 120 V = 16.04 A

3rd circuit: 1544 W / 120 V = 12.87 A

29.34+16.04+12.87 = 58.25 A, and I can use 60 A panel.

Last edited:

You are adding a relative small load (8.4kw) to an existing 150kva customer owned transformer.

All the wiring is outside.

If that's the case, 240.21(C)(4) applies and you can add a M/B panel adequate for the load. A 60 panel would be more than adequate

(You can, of course, go larger if you want to allow for future loads)

- Location
- Houston

- Occupation
- Noob EE

- Location
- Houston

- Occupation
- Noob EE

1st circuit: 3521.2 W / 120 V = 29.34 A

2nd circuit: 1924.8 W / 120 V = 16.04 A

3rd circuit: 1544 W / 120 V = 12.87 A

Because my lighting is continuous load,

should I do 29.34 * 1.25 = 36.675 A

16.04 * 1.25 = 20.05 A

12.87 * 1.25 = 16.0875 A

and go to Table 310.16, to size the conductors?

- Location
- Houston

- Occupation
- Noob EE

- Location
- Houston

- Occupation
- Noob EE

Okay.Unless you are already locked in on 120v fixtures I would suggest 208v fixtures. Reduces your current and helps on voltage drop.

1st circuit: 3521.2 W / 208 V = 16.93 A

2nd circuit: 1924.8 W / 208 V = 9.25 A

3rd circuit: 1544 W / 208 V = 7.42 A

Because my lighting is continuous load,

should I do 16.93 * 1.25 = 21.1625 A

9.25 * 1.25 = 11.5625 A

7.42 * 1.25 = 9.27 A

There are very low amps. Table 310.16 does not show wire size for this low. Which other table?

and go to Table 310.16, to size the conductors?

- Location
- Houston

- Occupation
- Noob EE

see instant message