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IMO DC disconnect inside a structure

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garybryan33

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Aug 22, 2023
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NEC dictates DC circuits are to be in metal conduits within a structure. The IMO DC disconnect is Plastic/pvc, do I need to install these inside a metal enclosure?

I planned to mount 3 DC disconnects on top of a metal enclosure using chase nipples. Run my PV wire to the metal enclosure via a 1-inch EMT, wire the 3 DC disconnects, and back out the bottom of the enclosure to the inverter.
 
PVC won't last outside, I would recommend if you really need to have a separate disconnect for solar, you get one that is code compliant and can handle switching high voltages in load. The Square D HU361RB is one such device.
 
I am going through the same discussion with myself.
I have decided to put the IMO disconnects in a metal cabinet next to the inverter.
The metal cabinet will also house the Midnite Solar surge protection and fuses for my panels.
I bought this box - Vevor NEMA box
 
My solution was to just purchase a hybrid that had all the code required features including built in disconnects ( Solis S6 ) and the previous was a Solis 5G that has it built in as well
 
I believe the IMO disconnects are redundant as the 18k has a pv disconnect and RSD built in, I added the Tigo 2F modules on my panels.
However, the IMO is on my plans and have to be installed for inspection.
 
Quattrohead said:
I believe the IMO disconnects are redundant as the 18k has a pv disconnect and RSD built in, I added the Tigo 2F modules on my panels.
However, the IMO is on my plans and have to be installed for inspection.
Click to expand...
The 18k manual calls for DC disconnect and suggests the IMO. I am also running the Tigo 2f's with the 18K built-in RSD
 
Quattrohead said:
Almost perfect, just needs the ability to lock it off.
Click to expand...
They have lockable versions as well, just not sure off-hand where they are for sale or just have to ask them to order them:

IMO Panel Mount SI Series DC Isolators / DC Disconnects

Since its launch, the SI range of TRUE DC isolators has set the benchmark safety standard for disconnection and isolation of the DC panel load in solar applications world-wide. Prior to the introduction of the SI series, AC modified isolators in multi-pole linked form were commonly used with all...
imoautomation.com imoautomation.com
or

IMO Base Mount Lockable SI Series DC Isolators / DC Disconnects

Since its launch, the SI range of TRUE DC isolators has set the benchmark safety standard for disconnection and isolation of the DC panel load in solar applications world-wide. Prior to the introduction of the SI series, AC modified isolators in multi-pole linked form were commonly used with all...
imoautomation.com imoautomation.com
 
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