Best 7 pole junction box

[RVhiker]

What is the strongest, most long lasting, waterproof 7 pole junction box (for attaching trailer umbilical to trailer wiring)- Pollak 52259, Bargman 787535, Conntek 10000-BX or something else?

[westend]

Mex wrote:
Clever mechanics will go online and purchase ready-to-go 12 volt LED 5mm lights and bezels and drill 7 holes in the lid for the lamps. Presto! A diagnostic tool-in-place. Over the years you will not believe how much time the LED modification will save.

That is one great idea!
I actually have those in stock, the bezels and LED's, and have never used them like that. :h

I installed a steel box on the tongue and I have a 24 terminal strip mounted in there to connect everything. I don't think the OP can go wrong with any of those connection boxes, some of them sold for < $10 and seemed very adequate for the job.

FWIW, I have a roof-top connection box for my solar panel. I used a 2" conduit LB and a grommeted box entry clamp. I sometimes have to remove snow off it if it gets deep. It doesn't leak.

[MEXICOWANDERER]

The stoutest plastic I have yet encountered is colored gray (Grey for BLT13).

They gray is not shiny. Rather fibers (fibres for BLT) can be seen running helter skelter throughout. Tool boxes, cargo boxes, and other plastic items have been made from it and they are damned near indestructible.

As was mentioned above I heartily endorse gobbing dielectric silicone GREASE all over the seven studs inside, over the wire jacketing where cables pass through rubber grommets.

Use ADEL rubber/steel cable clamps 2" from the box to support the cables. Clever mechanics will go online and purchase ready-to-go 12 volt LED 5mm lights and bezels and drill 7 holes in the lid for the lamps. Presto! A diagnostic tool-in-place. Over the years you will not believe how much time the LED modification will save.

(I hope BFL13 is in a good mood today 🙂 )

[beemerphile1]

Mine uses a standard 4" metal J-box mounted on the tongue. It has worked without trouble for 10 years now.

[RoyB]

My 2008 model camper is just a standard electrical junction box with lid. The color codes are color for color and use the large yellow twist connectors...

I have seen some boxes have a terminal strip in them to make connections... I'm guessing that is what you are referring to.

Nothing special about mine... Works fine and I have replaced a 7-way cable a few years back that got pulled out somehow and drug its self to death...

Roy Ken

[westend]

I like that the Conntek comes with a variety of rubber grommets for the box entry wires. Otherwise, they all look similar.

A guy could DIY a sealed box with grommeted entry and a terminal strip, easily. But for the low money of the shelved versions, why bother?

[Peg_Leg]

Which ever way you go use plenty of dielectric grease.