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L5-30P to L14-30R Plug Adapter Power Cord – PDU Whips
15 Amp NEMA 5-15 Male to 30 Amp NEMA L5-30 Female Adapter Cord by AC WORKS® | eBay
Superior Electric RVA1558 Shore Power Extension Cord 30 Amp STOW 10AWG/3, 25ft
Power Extension Cord, NEMA L5-30p to NEMA L5-30r- Heavy Duty Locking Connectors - China Y Splitter AC Power Cord, IEC 320 C14 Male Plug to 2xc13 Female Splitter | Made-in-China.com