Expert Liquidtight Flexible Metal Conduit (LFMC) Services

For all your Liquidtight Flexible Metal Conduit (LFMC) needs, Armo Electric USA brings the expertise and quality workmanship that Los Angeles County property owners depend on.

The wiring in your walls is the silent backbone of everything electrical in your home. Liquidtight Flexible Metal Conduit (LFMC) � 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.

Our Process — Step by Step

Initial consultation and assessment of your electrical needs
Detailed proposal with scope of work and timeline
Obtain required permits from the City of Los Angeles or local municipality
Professional installation by licensed journeyman electricians
Thorough testing of all new work with calibrated instruments
Clean up and walkthrough with homeowner
Final inspection coordination and permit sign-off
Provide warranty documentation and maintenance recommendations

Why Los Angeles County Trusts Armo Electric for

🔬 Materials Expertise That Matters

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.

📏 Precision Installation Standards

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.

👨‍👦 Decades of Combined Wiring Experience

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.

✅ Aluminum Wiring Remediation Specialists

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.

📋 From the Field — A Real Story

📋 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.

THHN vs. THWN vs. Romex — Wire Type Comparison

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)

Frequently Asked Questions About

❓ How do I know if my home has aluminum wiring?

Homes built between 1965-1973 may have aluminum branch circuit wiring, which has higher fire risk due to oxidation and thermal expansion at connections. Look at the wiring in your panel — aluminum wire is silver-colored versus copper's distinctive orange. If you have aluminum wiring, don't panic — we install approved remediation methods (COPALUM crimps or AlumiConn connectors) that make aluminum wiring safe.

❓ What gauge wire do I need for a 20-amp circuit?

12-gauge copper wire is rated for 20 amps under standard conditions. Using 14-gauge (rated for only 15 amps) on a 20-amp circuit is a code violation and fire hazard. For long runs over 50 feet, consider upsizing to 10-gauge to minimize voltage drop. Our electricians calculate the correct gauge for every circuit.

❓ What's the difference between THHN and Romex?

THHN is individual insulated wire designed to be pulled through conduit. Romex (NM-B cable) bundles multiple conductors in a single outer sheath for in-wall residential installation. THHN is used in conduit, commercial buildings, and exposed locations. Romex is for concealed residential wiring. Each has specific NEC applications — using the wrong type is a code violation.

❓ What warranty do you offer?

We provide comprehensive warranties covering both parts and labor on all installations. Warranty terms vary by project type — typically 1-3 years for labor and manufacturer warranties on parts. Specific warranty details are included in your written estimate.

❓ Do you pull permits for electrical work?

Yes — we obtain all required permits from your local building department. Permitted work is inspected by a city or county inspector to verify code compliance. This protects you legally, ensures safety, and prevents issues when selling your home or filing insurance claims.

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Get Your Free Estimate Today

Contact Armo Electric USA at (866) 971-2246. Licensed electricians standing by to assist you.

Liquidtight Flexible Metal Conduit (LFMC) — Armo Electric USA