HD Contractor Extension Cords

Factory Direct - American Made

  • Extra Heavy Duty
  • Extra Flexible
  • 600 Volt
  • Oil Resistant
  • Copper Conductor
  • Factory Direct Pricing
  • Made in USA
12 Gauge Extension Cord
12 Gauge with Box
Cam-Lok Pigtail

HD 12 Gauge 600V Contractor Extension Cords M&F Plugs USA

NEMA 5-15P Male Plug
NEMA 5-15P
Male Plug
Wire GaugeLength (ft)Per FootWire CostPlugs InstalledTotal CostWt. (lbs)
12/3 SOW25'1.0025.0015.0040.007
12/3 SOW50'1.0050.0015.0065.0014
12/3 SOW75'1.0075.0015.0090.0021
12/3 SOW100'1.00100.0015.00115.0028
12/3 SOW125'1.00125.0015.00140.0035
12/3 SOW150'1.00150.0015.00165.0042
NEMA 5-15 Female Connector
NEMA 5-15C
Female Connector

HD 12 Gauge 600V Contractor Extension Cords 4 Outlet Box

NEMA 5-15P Male Plug
NEMA 5-15P
Male Plug
Option 2: L5-30P
Option 3: L14-30P
Wire GaugeLength (ft)Per FootWire CostPlugs InstalledTotal CostWt. (lbs)
12/3 SOW25'1.0025.0015.0040.007
12/3 SOW50'1.0050.0015.0065.0014
12/3 SOW100'1.00100.0015.00115.0028
12/3 SOW150'1.00150.0015.00165.0042
NEMA 5-15R Female Outlet Junction Box
NEMA 5-15R
4 Outlet Box
Option 2: Replace NEMA 5-15 Plug with L5-30 Plug +$6.00
Option 3: Replace NEMA 5-15 Plug with L14-30 Plug +$9.00
Note: Non weatherproof box - NOT recommended for wet locations.

HD 10 Gauge 600V Generator Extension Cords NEMA L5-30

NEMA L5-30 Male Plug
NEMA L5-30P
Male Plug
Wire GaugeLength (ft)Per FootWire CostPlugs InstalledTotal CostWt. (lbs)
10/3 SOW25'1.4035.0035.0070.009
10/3 SOW50'1.4070.0035.00105.0018
10/3 SOW100'1.40140.0035.00175.0036
10/3 SOW150'1.40210.0035.00245.0054
NEMA L5-30 Female Connector
NEMA L5-30C
Female Connector

HD 10 Gauge 600V Generator Extension Cords NEMA L14-30

NEMA L14-30 Male Plug
NEMA L14-30P
Male Plug
Wire GaugeLength (ft)Per FootWire CostPlugs InstalledTotal CostWt. (lbs)
10/4 SOW25'1.6040.0040.0080.009.5
10/4 SOW50'1.6080.0040.00120.0019
10/4 SOW100'1.60160.0040.00200.0038
10/4 SOW150'1.60240.0040.00280.0057
NEMA L14-30 Female Connector
NEMA L14-30C
Female Connector

Jumper Cords - Pigtails & Feeder Cables

15 Amp Jumper Cords - Pigtail (Whips)

Jumper Cord
1' - 3' Jumper
NEMAMaleFemaleCost10+
ML-275947593$38.00$36.00
ML-374857484$41.00$39.00
NA75677565$36.00$34.00
L5-154721N4731N$33.00$31.00
Price includes up to 3 ft of wire.
16/3 SJOW or 14/3 SJOW 300v wire • 16/3 SOW or 14/3 SOW 600v wire

30 Amp to 15 Amp Jumper Cords - Pigtail (Whips)

Jumper Cord
1' - 3' Pigtail
Wire GaugeMaleFemaleCost
10/3 SOWL5-30P5269N$35.00
10/3 SOWL14-30PL5-30C$45.00

50 & 60 Amp to 30 Amp Plugs & Mini Cams - Pigtails

Wire GaugeMaleFemaleCost
10/4 SOW5745NL14-30C$60.00
10/4 SOW9462NL14-30C$60.00
6/4 SOW5745NMiniCam$80.00
6/4 SOW9462NMiniCam$80.00

50 & 60 Amp Twist Lock to Mini Cam Lock Connectors - Pigtails

Wire GaugeMaleFemaleCost
6/4 SOW3764EXMini-Cams$130.00
6/4 SOW7765EXMini-Cams$130.00
6/4 SOWMini-Cams3764EX$133.00
6/4 SOWMini-Cams7764EX$145.00

Made in USA - National Supply Green Bay WI

National Supply Company, takes pride in its solid reputation as a top quality power cord manufacturer offering cord sets from 15 amp to 60 amp and beyond with our line of plugs and cam-lok connectors.

We use UL & CSA recognized, plugs and connectors from the nations most trusted manufacturers including Cooper Industries, and Hubbell Wiring Devices.

All our electrical wire and cable is neoprene jacketed with copper conductors, outdoor rated, available in 300 volt and our heavy duty high amperage, 600 volt rated wire.

Always 100% copper conductor, never copper coated aluminum wire, or copper coated steel.

All cord sets are American made, manufactured right here in Green Bay Wisconsin, made in USA.

To order, call today: (800) 726-8044

Wholesale & Volume Purchases

National Supply does offer volume and wholesale pricing. Call today to find out more. (800) 726-8044

Important Tips when Buying Wire or Extension Cords

Our Heavy duty contractor cords are made with type SOW / SOOW electrical wire.

  • "S" in SOOW stands for "severe service cord"
  • "OO" stands for "Oil-Resistant Outer Jacket and Oil-Resistant Interior Insulation"
  • "W" stands for "Weather Resistant for indoor and outdoor use"

Our recommendation: Avoid any wire with the letter "T" anywhere in the designation (STO, STW, SJT). Thermoplastic is not recommended for severe service or cold conditions.

The "J" in "SJ" stands for "Junior Service 300 volts" - thin jacketed wire is not recommended for severe service.

In Stock and Same Day Shipping

Lowest Price Guarantee - Satisfaction Guaranteed
Call National Supply Today

(920) 435-6500
(800) 726-8044

About National Supply

National Supply is a nationwide leader in the distribution of specialty lighting and electrical products for the carnival and amusement park industry. Service is our number one priority.

Supplying the Amusement Industry Since 1984

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