Trust Armo Electric USA for all your Conduit Installation (EMT, IMC, Rigid, PVC) needs. Our certified electricians deliver outstanding workmanship every time.
The wiring in your walls is the silent backbone of everything electrical in your home. Conduit Installation (EMT, IMC, Rigid, PVC) requires precise knowledge of wire gauges, insulation ratings, and local code requirements. Using the wrong wire for an application isn’t just a code violation — it’s a fire waiting to happen.
THHN (Thermoplastic High Heat-resistant Nylon-coated) wire is rated for 90°C in dry locations. THWN adds wet-location rating at 75°C. Most modern wire is dual-rated THHN/THWN-2, suitable for both dry and wet environments. The nylon jacket provides mechanical protection during pulling through conduit.
Wire gauge directly determines ampacity — the maximum current a wire can safely carry. 14-gauge copper handles 15 amps, 12-gauge handles 20 amps, 10-gauge handles 30 amps, and 8-gauge handles 40 amps under standard conditions. These ratings decrease with ambient temperature, conduit fill, and bundling — factors that professional electricians calculate for every installation.
Romex (NM-B) cable is the standard for residential branch circuits — it bundles hot, neutral, and ground wires in a single sheath. However, Romex cannot be used in conduit, in commercial buildings, or in exposed locations. For these applications, individual THHN conductors in EMT or PVC conduit are required.
Wire selection isn’t glamorous, but it’s where safety begins. We specify exact wire types, gauges, and insulation ratings for every application — because using 14-gauge on a 20-amp circuit or THHN in a wet location isn’t just a code violation, it’s a fire hazard.
Every connection we make is torqued to manufacturer specifications, every splice is made with approved methods, and every wire is routed to minimize mechanical stress. These details don’t show on the surface — but they’re what separates professional work from handyman work.
Our team has rewired hundreds of LA County homes — from knob-and-tube remediation in 1920s Craftsmans to structured wiring in new construction. Whatever your wiring challenge, we’ve likely solved it before.
If your home has aluminum branch circuit wiring (common 1965-1973), we offer COPALUM cold-weld crimping — the only method recommended by the CPSC for permanent aluminum-to-copper connections.
📋 Recent Service Call — Alhambra, CA: A home inspector flagged “aluminum wiring” in a 1971 home in Alhambra, and the buyer almost walked away from the deal. We performed a full assessment and found single-strand aluminum on 15 of 22 branch circuits. Rather than a complete rewire ($30K+), we installed COPALUM cold-weld crimps at every connection point — outlets, switches, fixtures, and panel terminations. Total cost was under $5,000, and the home passed re-inspection with flying colors. The buyer closed on the house.
| Feature | THHN | THWN-2 | Romex (NM-B) |
|---|---|---|---|
| Temperature Rating (Dry) | 90°C | 90°C | 90°C |
| Wet Location Rating | ❌ Not rated | ✅ 75°C wet | ❌ Not rated |
| Installation | Individual wires in conduit | Individual wires in conduit | Cable — no conduit needed |
| Residential Use | In conduit only | In conduit, wet locations | ✅ Standard for in-wall branch circuits |
| Commercial Use | ✅ Standard | ✅ Standard | ❌ Not permitted |
| Cost | $ | $ | $$$ (bundled cable) |
For expert electrical solutions, call us at (866) 971-2246. We offer free estimates with no obligation.
Same-day service. Free estimates. Licensed & insured electricians standing by.
📞 Call (866) 971-2246 Get Free Estimate