AC WORKS L5-30 to L14-30 Generator-to-Transfer-Switch Adapter — 30A STW 10/3 Cold-Weather Locking Cord

AC WORKS L5-30P to L14-30R adapter cord converts a 30A 3-prong generator outlet into a 30A 4-prong transfer switch inlet for safe, temporary power connections.

This heavy-duty adapter from AC WORKS bridges a NEMA L5-30P (30A 125V locking) generator plug to a NEMA L14-30R (30A 125/250V 4-prong locking) inlet commonly used on transfer switch inlet boxes. Built with STW 10/3 anti-cold-weather cable, it stays flexible in low temperatures and provides a secure locking connection for portable generators and manual transfer switches. It’s designed for reliable, short-term power routing during outages, job sites, or RV use where a generator must feed a switched inlet.

How does this adapter enable a generator to feed a transfer switch?

The adapter mates the generator’s L5-30 locking output to the transfer switch’s L14-30 inlet, creating the correct pin configuration and bridging hot conductors to supply both 120V and 240V circuits through the inlet. It maintains proper locking connections and durable wiring suitable for frequent installation and removal.

• NEMA L5-30P male plug to NEMA L14-30R female connector
• Bridges hot conductors for combined 125/250V availability
• Locking connectors reduce accidental disconnects
• STW 10/3 cable supports portable generator use

Is the cord safe and durable for cold-weather use?

Yes — the adapter uses STW 10/3 anti-cold-weather jacketed cable that remains flexible in low temperatures, reducing kinks and stress on connections. The molded plugs and strain relief protect the internal conductors from moisture, abrasion, and repeated handling.

• STW-rated 10/3 cable resists cold stiffening
• Molded ends with strain relief prevent pull-out
• Locking connectors ensure secure electrical engagement
• 30A construction for heavy-duty generator loads

Will this work with my generator and transfer switch inlet?

Use this adapter when your generator has a NEMA L5-30 (3-prong 30A) outlet and your inlet box accepts a NEMA L14-30 (4-prong 30A) female plug. Confirm connector types and amperage before use; this adapter does not change generator wiring or provide a neutral-to-ground bond.

• Compatible with L5-30 male generator outlets
• Plugs into L14-30 female transfer switch inlets
• Rated for 30 amps continuous per connector standards
• Not a substitute for permanent rewiring or bonds

How should I install and maintain the adapter for reliable operation?

Install by first turning off generator and transfer switch circuits, then lock the adapter into both mating connectors until fully seated. After use, inspect connectors for wear, wipe clean of debris, and store coiled in a dry place to preserve the jacket and molded ends.

• Always stop power before connecting or disconnecting
• Inspect cable and connectors before each use
• Hand-tighten locking collars for secure mating
• Store coiled, protected from direct UV and chemicals

Who is this for: The AC WORKS L5-30 to L14-30 adapter cord is aimed at homeowners, contractors, and RV owners who need a rugged, temporary method to feed a transfer switch inlet from a portable generator. It’s ideal when compatibility between a generator’s 3-prong locking outlet and a 4-prong transfer switch inlet is required, especially in cooler climates where cable flexibility matters.