Electrical Reducing JBs

[dungun]

Hi,I have big size of cable but the terminal box motor entry small. I use the reducing JB and from reduce JB one cables to the terminal box motors. unapurtunitly client asking any code/regulation permit this arrangment at site?. Help

 

[54494060]

dungun

Question(s):
Motor Size (HP), Motor Supply Voltage, Supply Cable Size, What Country, and what is/does "unapurtunitly" mean?

12fish
As Iron sharpens Iron so does a man sharpen the countenance of his friends.

 

[dungun]

Hi 54494060
150KW, 440V ,300mm sq, Subcontinent, mean ... "however" client...

 

[ScottyUK]

Is the cable sized for volt-drop reasons, or for thermal rating? I am guess it will be volt-drop unless you have a very unusual environment - 185mm[²] would be about right for a typical installation. You could safely reduce the cable to a smaller size of adequate thermal rating provided that the protective devices are suitably selected for the smaller cable, unless this is specifically excluded by your local regulations. You haven't yet disclosed where you are, so that is open to speculation.

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I don't suffer from insanity. I enjoy it...

 

[dungun]

ScottuUK
This size due to the voltageDrop. All the sizing done by properl calc i.e from MCC to red JB and from JB to motor. All Jbs/acessories according to area clasification. No Govement regulation restriction but I dont find any restriction in code too (may be overlook) if someone experience the same thing can be shared. From northen pakistan.