Recently I have been given the task of designing a relatively cheap light pole that will light up path ways etc. These are a couple pictures of my finished product and I would like to here input on the design.
Attachment 19619Attachment 19620
It would be "stronger" if you bent the PVC into a "U" shape instead of using elbows. You would also have to use "sunlight resistant" PVC electrical conduit and then paint it white.
Unless you have a suitable oven, careful use of a heatgun can easily get PVC soft enough to bend into many shapes. PVC is thermoplastic, not thermosetting. As long as the bend is not tight enough to cause kinks or to thin the outer circumference excessively, it works. I bent a (smaller OD) piece for the drain on my a/c with a heatgun...worked fine. I figured it would be less likely to clog up verses an elbow (but that's not an issue for what you're dealing with). I do question the ability of the tall fixture to not bend under the weight over time...pvc is not structural.
Heat it and then bend it around a mandrel. The pipe's "integrity" will not be compromised.
Ok thanks I will try that on the next lamps I build.
Sorry to be a wet blanket. PVC (any kind) is not legal for this use. The National Electrical Code regulates 120 volt circuits. It sets out how long pipes can go unsupported and whether they're allowed to hold fixtures or not. The rules for low voltage are much looser.
After a few hot sunny days your light poles will wilt. They'll bend right over till the lamps touch the ground and start grass fires. The wind is going to mess them up too. With age the PVC gets brittle and they would snap, but the other stuff will happen first.
You may be able to use Rigid Metal Conduit (RMC) or Intermediate Metal Conduit (IMC). Someone would have to confirm that in the code. But you wont like the price or the hassle.
If what you built is PVC, and 120 volts, it is dangerous. It is either going to destroy property or it's going to kill someone. Take it down now. It wont just be a lawsuit. It will be jail time for reckless disregard.
You have NO place "designing" and building light fixtures for sale or installation. You need certification and testing. You also need to use the right kind of materials, which technical and legal knowledge of the field would have told you.
I completely agree, TAKE IT DOWN and buy a proper fixture assembly.
and it is around 40 volts not 120.
“For time and the world do not stand still. Change is the law of life. And those who look only to the past or the present are certain to miss the future.”
—John F. Kennedy
Is it raining on the parade here ?
Not all PVC is made of the same formula.
The Rocket test should be later tonight or tomorrow...
410.6 Listing Required.
All luminaires and lampholders shall be listed.
What his means is that one cannot just throw some pipe together and call it a light. It must be evaluated by a NRTL