NEC 314.16

[WaterMoves]

Hello All, first time here, so thanks in advance!

Per 2020 NEC 314.16, what is the minimum Underwater Junction Box (JB) volume? I have looked at all the Tables and read the text; I need to confirm I'm doing this correctly. I tried to insert an image, but for some reason, that does not work.

There are three #12 conductors coming from the Control Panel (CP) to the JB.

Six underwater LEDs are connecting to the JB.

Each underwater LED has three #18 conductors for a total of eighteen #18 conductors.

Each one of the #12 conductors will connect to six #18 conductors.

12 * 36.9 = 110.7 cm3

18 * 24.6 = 442.8 cm3

Total = 553.5 cm3

 

[Dennis Alwon]

Hello All, first time here, so thanks in advance!

Per 2020 NEC 314.16, what is the minimum Underwater Junction Box (JB) volume? I have looked at all the Tables and read the text; I need to confirm I'm doing this correctly. I tried to insert an image, but for some reason, that does not work.

There are three #12 conductors coming from the Control Panel (CP) to the JB.

Six underwater LEDs are connecting to the JB.

Each underwater LED has three #18 conductors for a total of eighteen #18 conductors.

Each one of the #12 conductors will connect to six #18 conductors.

12 * 36.9 = 110.7 cm3

18 * 24.6 = 442.8 cm3

Total = 553.5 cm3

We usually work in cu. in but you have the right idea.

 

[infinity]

Hello All, first time here, so thanks in advance!

Per 2020 NEC 314.16, what is the minimum Underwater Junction Box (JB) volume? I have looked at all the Tables and read the text; I need to confirm I'm doing this correctly. I tried to insert an image, but for some reason, that does not work.

There are three #12 conductors coming from the Control Panel (CP) to the JB.

Six underwater LEDs are connecting to the JB.

Each underwater LED has three #18 conductors for a total of eighteen #18 conductors.

Each one of the #12 conductors will connect to six #18 conductors.

12 * 36.9 = 110.7 cm3

18 * 24.6 = 442.8 cm3

Total = 553.5 cm3

Your calculation for the 7 EGC's is incorrect.

As Bill requested please update your profile.

 

[Dennis Alwon]

I have spoken with the op and we are good as they design equipment and need some guidance. The op is using 24 v in the first post so there is no equipment grounding conductor.