480 volt circuit connections under water

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nema 4x is washdown, corrosive environment
nema 6p is prolonged submersion at limited depth

water-tight splices/connections are the way to go
 
don_resqcapt19 said:
I would look at Raychem GelCaps over a crimp ring and bolted connection. The GelCap is filled with a re-enterable silicone gel that keeps the water out.
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I haven't used these, but this would be the way to go.

Next up would be the 3m epoxy kits, but it'd be a pain if you ever needed to split the circuit up for troubleshooting and had to cut the splices out.
 
ptonsparky said:
I see they have a new version of scotchcoat out that doesn’t require me to bury the guy that spills it on himself. GB has a version that seems to work well too.
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Thats why I quit using scotchcoat a number of years ago, especially if in contact with potable water (submersible Pump splices). I will still get a trace hit for tolune in most new sub pump installations. Don’t know if it’s outgassing from the submersible wire jacket, the pipe wrap tape we use to secure the sub wire to the drop pipe, or the pipe thread compound.

I haven’t looked at my can of scotchcoat lately, but i remember it had some pretty strongly worded safety restrictions.
 
Cow said:
Wet location wire and splices are readily available, but they don't let you use them in underground boxes or vaults over there in the UK?
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We did a fair bit of work for water companies including submersibles. The motor leads were usually short straight out of the motor so connection boxes were generally down the well. We wouldn't be permitted to use splices, waterproof or otherwise. Terminals were DIN rail in an IP66/67 box with CW glands for cable entry and exit.

These were customer/consultant specs. I don't know whether the regs mandated them.
 
Besoeker said:
We did a fair bit of work for water companies including submersibles. The motor leads were usually short straight out of the motor so connection boxes were generally down the well. We wouldn't be permitted to use splices, waterproof or otherwise. Terminals were DIN rail in an IP66/67 box with CW glands for cable entry and exit.

These were customer/consultant specs. I don't know whether the regs mandated them.
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In a handhole enclosure you basically must use items that are otherwise direct bury suitable. Many cases even the enclosure will silt in over time. The cover just makes it easier to know where the connections are without the need for locating equipment. Been to places where cover gets buried over time and still need to probe around to find it.
 
Cow said:
I haven't used these, but this would be the way to go.
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I use them for motor connections where they will fit in the motor junction box. We would typically use rubber and plastic tape on those connections in the past. I find the GelCaps to be better, and cheaper than taping.
 
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