Sherry has been writing about home, family, and pets since 2008. She enjoys retirement, traveling, reading, and crafts.
Lamp Rewiring: Step-by-Step Guide
Building or repairing a lamp for your home is not hard to do. The principles are easy, and all you need is a screwdriver and a wire clipper. Measuring, a vision, and where to buy lamp parts helps the process move along faster. Keep three rules in mind before you start.
- Have the lamp unplugged.
- Start from the bottom and work to the top of the lamp.
- Arrange screw nuts, necks, and spindles to secure each section of the lamp at a junction.
The process is demonstrated here with a vintage Gonder lamp acquired several years ago. Finally, I found a shade, and I was ready to rewire my 1940s-style table lamp.
Table Lamp Restoration: Summary of Steps
- Assess the rebuild
- Take measurements
- Start assembly
- Stack the parts
- Assemble the socket
- Adjust the harp
1. Assess the Rebuild
First things first, you need to determine the scope of the project. For my lamp, I decided that I needed to do the following:
- Dismantle the cord and parts of the lamp.
- Measure the shade for correct harp size.
- Reuse the socket because it is in good shape.
- The cord is cracked, and a new cord has been ordered.
- Reuse vintage finial.
Are You Considering a Lamp Rebuild?
Dismantling the Old Lamp
2. Take Measurements
Here are some tips for taking measurements:
- A harp should be the same height as the shade.
- Consider the measurements between the on/off switch and the top of the socket for the cord leader length.
- Measure the length needed between the bottom of base and outlet.
The image above illustrates parts needed for a rewiring. Consider the cord as two measurements.
- Socket to on/off switch. This is known as the leader.
- Length needed from base to outlet.
The spindle is one inch longer than the 3-inch brass neck decided on. This allows for screw tightening at both ends.
Local stores do not have a full stock of various lengths in lamp parts. The internet is going to be your source.
Take note of the socket assembly. There are three parts: bottom cup, the inside with the knob, and the metal outer shell. Let's put the table lamp together!
3. Start Lamp Assembly
Our lamp has a very tall base and threading the cord needed some extra problem-solving.
Since the base is 15 inches high, I twist-tied a BBQ skewer onto the wire end to aid in threading the cord and spindle through the hole at the top of the base. A straightened coat hanger probably would have worked better.
The spindle is four inches because the brass neck is three inches, leaving enough screw threads on each end for the tightening of the components. The felt is inside resting against the pottery hole, and the nut is in place as an anchor for tightening the assembly.
4. Stack the Parts
Put the decorative neck over the spindle.
Now thread the harp, and last is the bottom of the socket. The cord was lost once into the base. A simple twist and an anchor nut holds the cord until it is secured with a UL knot.
5. Assemble the Socket
The bottom of the socket screws onto the top of the four-inch spindle.
Tighten the socket. It should be very tight, and the whole assembly should not have any wiggle room.
A UL underwriter's knot is needed to prevent pulling on the screwdowns. It is a simple over hand knot.
The wire ends should fit under the screw like an inverted J. Screw the J shaped wire ends securely under the screws of the socket component.
Lay the knot flat as possible and stand the inside unit into the base.
Slip the outer part of the socket over it lining up the area for the switch knob. Give the outside case a nudge down, and it will snap into the bottom of the socket, securing everything into place.
You are ready to test a light bulb.
6. Adjust the Harp
- The cradle arrangement at the top of your harp can be tipped back and forth for leveling the shade.
- Tighten the cradle using a pliers by pinching the small projections on each side to the center.
- Set shade on top.
- Use a finial to secure the shade to the harp.
The Matching Gonder Pottery
The color of this old pottery sometimes looks green and at other times looks brown-mustard. There are no chips or crazing, and I love the pieces collected.
With a new cord and socket rewiring, this lamp is safe to use and fits into matching home decor for many years of enjoyment. Satisfaction guaranteed!
Last Reminders for Lamp Restorers
I have built two lamps. I am not a professional, but with trial and error, most decorators can rebuild lighting for your home.
- Always use the UL Knot.
- Find a good source for lamp parts.
- Use nuts and screw elements at all junctions to stabilize the parts for tight fits.
© 2014 Sherry Venegas
Have questions or comments about building a lamp?
Sherry Venegas (author) from La Verne, CA on March 10, 2015:
If you have any questions, let me know.
C E Clark from North Texas on March 09, 2015:
I think being able to repair or build a lamp is so cool. Years ago when I was still in elementary school I remember my sister-in-law repairing one of our floor lamps, fixing or replacing the switch. She talked about how easy it was to build a lamp, too. I've seen some really interesting hand made lamps. I really appreciate this article and I'm going to have to study it a little when I have more time. Wish you were my neighbor so I could get some direct instruction . . .
Rose Jones on January 24, 2014:
You go girl. Pinned to my home repair board.
Merry Citarella from Oregon's Southern Coast on January 23, 2014:
Great how-to! I don't need it just now, but sure could have used it in the past!
Kathryn Grace from San Francisco on January 23, 2014:
Lovely! The shade looks beautiful with the base. Thank you for sharing these tips.
lesliesinclair on January 22, 2014:
Nice job! I've done this too and I appreciate what you went through.