Using Deutsch or Delco Connectors - Do they need Strain Relief?

HomeBuiltAirplanes.com

Help Support HomeBuiltAirplanes.com:

wsimpso1

Super Moderator
Staff member
Log Member
Joined
Oct 18, 2003
Messages
6,716
Location
Saline Michigan
I am working on my wiring, and I am an infant on this topic. I have resolved to use sealed connectors inside the stub wings to hook things up rather than run long wires after install of the wing outer panels or to use butt connectors on every wire - I have 14 wires, one BNC connector, two 3/8" fuel lines, and three 1/8" air lines all to connect while working through an inspection cover - I am using multi wire connectors here.

The Deutsch and Delco connectors that seal on the wires and then seal the joints do not have provision for strain relief of the wires leaving the connectors. I am so used to seeing strain relief on D-Sub connectors and the like, that I was expecting strain relief here.

Is it durable and sturdy using the connectors as is? The bundles are supported with Adel clamps on both ends of the junction area, the connectors will be staggered and clipped to mounting points. Are there other precautions that should be taken here?

Billski
 

Hot Wings

Grumpy Cynic
HBA Supporter
Log Member
Joined
Nov 14, 2009
Messages
6,995
Location
Rocky Mountains
When I was wiring fire trucks we didn't use strain reliefs on these types of connectors and had no warranty problems. Most of our connectors were also free floating rather than clipped down. The only time a UL test was failed for wiring was when something was missed during the shop floor inspections.
 

pictsidhe

Well-Known Member
Joined
Jul 15, 2014
Messages
7,426
Location
North Carolina
If you are talking about the car type connectors, I have rarely seen them with strain relief. The cables leaving them will (should) be anchored nearby which will provide the strain relief. As long as the wiring does not vibrate at the connector, you should be good. Make that happen however seems best.

Belt and braces:
My truck recently broke down on the way to work. The quick fix was to plug the coil connector back in. My 'proper' fix when I got home was to zip tie the connector spring latch down... Over the years, it had lost its spring and ability to catch.
 

rv6ejguy

Well-Known Member
Joined
Jun 26, 2012
Messages
3,749
Location
Calgary, Alberta, Canada
We've been using the Weatherpack connectors for 25 years in thousands of EFI systems. The properly fitting silicone grommet provides good strain relief. The grommets come in various sizes for different wire gauges. If you have an Adel further down the line to prevent major deflections, stuff should last a lifetime.
 

wsimpso1

Super Moderator
Staff member
Log Member
Joined
Oct 18, 2003
Messages
6,716
Location
Saline Michigan
I got word back from the distributors that both are adequately strain relieved with their seals. That you experienced folks agree is extra confidence. Thanks guys!

Billski
 
Top