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Topic: Rewiring homes with cloth covered wire

User: jeffelectric1992, Location: Chicago IL

Asked on: Saturday, February 1, 2025 at 1:54 pm EST
Answered on: Thursday, March 6, 2025 at 8:07 am EST

Question: I have been rewiring homes in the Chicagoland area for the last ten years. While I have rewired a few homes in that time that hadKnob & Tube installed the vast majority have been a combination of individual cloth covered conductors installed in rigid black conduitor cloth covered conductors in BX cable. As these conductors age they become brittle and the cloth and rubber insulation deterioratesleading to failure. We have developed many techniques to minimize the damage we do to our clients homes. I would love to hear fromother electricians who specialize in this type of service and to share tips and techniques that we have developed to make this kind of worksafe, rewarding and worthwhile for our clients.

This is a great start to a conversation! You've clearly identified a common issue in older Chicagoland homes and positioned yourself as an expert. To further encourage interaction and get the ball rolling with other electricians, consider adding the following

1. Specific Examples & Questions:
Instead of just mentioning techniques, provide a brief, specific example and then ask a related question. This makes it easier for others to jump in with their own experiences. For example: "When pulling wires through rigid conduit with tight bends, we've had success using [specific wire lubricant] and a fish tape with a flexible tip. What are your preferred wire lubricant and fish tape brands for these situations? Any tricks for navigating particularly stubborn bends?" Mention specific challenges and ask for solutions. For instance, "Dust and asbestos are always a concern when dealing with aging BX cable. Besides using proper PPE, what specific containment strategies do you find most effective in minimizing dust migration throughout the home?" Give a brief anecdote of a rewarding experience. This adds a personal touch and highlights the "worthwhile" aspect you mentioned. For example, "We recently rewired a historic home in Oak Park and preserved the original plaster walls with careful planning. The homeowner was so thrilled they wrote a glowing review emphasizing our respect for their property. Have you had similar positive experiences that reinforced the value of meticulous work?"2. Focus on Specific Problem Areas



Compartmentalize your areas of expertise.
Instead of a general overview, break it down into specific aspects of the job. For example: Conduit Rewiring

"What strategies do you use to map out existing conduit runs? Any tools or methods for minimizing wall penetrations?" "Dealing with rusted or seized conduit joints can be a nightmare. What's your go-to method for disassembly?"

BX Cable Replacement

"How do you handle brittle BX cable sheathing when pulling it through walls? Any tricks to prevent it from cracking or crumbling?" "Properly grounding the new wiring when replacing BX can sometimes be tricky. What solutions have you found effective for creating a solid ground path?"

Dust and Debris Management

"What type of HEPA vacuum do you recommend for minimizing dust during the rewiring process?" "Besides plastic sheeting, what other containment methods do you use to isolate work areas?"

Preserving Plaster and Finishes

"What's your preferred technique for cutting minimal access holes in plaster walls?" "How do you ensure that the new wiring doesn't cause stress cracks in the plaster over time?"

3. Suggest a Specific Format for Sharing

"I'd be happy to share photos and videos of our techniques if others are interested. What format would be best for sharing (e.g., a dedicated thread, a shared Google Drive folder)?" "Perhaps we could even organize a virtual meeting or in-person workshop to demonstrate and discuss these techniques further."

4. Your Techniques to Tease the Audience



Mention a couple of specific, intriguing techniques to pique curiosity.
For example: "We've developed a method for using inflatable bags to gently push wiring through tight conduit runs without damaging the insulation. I'd be happy to explain it in more detail if there's interest." Or, "We've found a specific type of foam sealant that's excellent for closing small access holes in plaster without causing damage or discoloration. Happy to share the brand and application tips."Example Revised Post Incorporating These Suggestions

"Hi everyone, I've been rewiring homes in the Chicagoland area for the last ten years, primarily dealing with individual cloth-covered conductors in rigid black conduit or cloth-covered conductors in BX cable. We all know how brittle these conductors get, and the cloth/rubber insulation just crumbles!We've developed a few techniques to minimize damage to our clients' homes, and I'm eager to hear from other electricians specializing in this type of work.One challenge we often face is navigating tight bends in rigid conduit. We've had some success using Greenlee's Ultra Cable Pulling Lubricant with a Klein Tools flexible-tip fish tape.

What are your preferred wire lubricant and fish tape brands for these situations? Any tricks for navigating particularly stubborn bends?


Dust and asbestos are always a concern when working with older BX cable. Besides full PPE, what specific containment strategies do you find most effective in minimizing dust migration throughout the home? We've been experimenting with a portable air scrubber in the work area, but I'm open to suggestions.

We recently rewired a historic home in Oak Park and managed to preserve the original plaster walls with careful planning and the use of [Specific Tool for Small Hole Creation]. The homeowner was thrilled! Have you had similar positive experiences that reinforced the value of meticulous work?

One trick we use is inflatable bags to gently push wiring through tight conduit runs without damaging the insulation. If you are interested, I would be happy to explain this process and show pictures.

I'd love to start a discussion around these specific issues, perhaps sharing photos and videos of our techniques. What format would be best for sharing (e.g., a dedicated thread, a shared Google Drive folder)?

Let's share some knowledge and make this challenging but rewarding work a little easier (and safer!) for all of us."Key Takeaways



Be specific.
Ask questions. Share your expertise (but tease it!).* Propose a format for collaboration.

By implementing these suggestions, you'll create a more engaging and interactive post that's sure to attract the attention of other electricians facing similar challenges. Good luck! Flag for review

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