Alarm SystemsBrackets and Angle IronsBreakers, Distributors, and Load CentersCable ManagementConduits and FittingsDimmers, Switches, and Wall PlatesElectrical ToolsExtension Cord ReelsExtension CordsGarage Storage SystemsHome SafetyOutletsSolderingStorage ContainersStorm & Flood PrepSurveillance
Sort by|
Extension Junction Box(411)
Uses item details. Price when purchased online
VEVORSteel Electrical Box 24'' x 16'' x 12'' Electrical Enclosure Box, Carbon Steel Hinged Junction Box, IP65 Weatherproof Metal Box Wall-Mounted Electronic Equipment Enclosure Box with Mounting Plat From $108.99

Sponsored
From$10899
VEVORSteel Electrical Box 24'' x 16'' x 12'' Electrical Enclosure Box, Carbon Steel Hinged Junction Box, IP65 Weatherproof Metal Box Wall-Mounted Electronic Equipment Enclosure Box with Mounting Plat
VEVOR NEMA Steel Enclosure, 12 x 10 x 6'' NEMA 4X Steel Electrical Box, IP66 Waterproof & Dustproof, Outdoor/Indoor Electrical Junction Box, with Mounting Plate $48.90

Sponsored
$4890
current price $48.90VEVOR NEMA Steel Enclosure, 12 x 10 x 6'' NEMA 4X Steel Electrical Box, IP66 Waterproof & Dustproof, Outdoor/Indoor Electrical Junction Box, with Mounting Plate
VEVOR Outdoor Electrical Junction Box, 13.78 x 9.84 x 5.90 in, ABS Plastic Electrical Enclosure Box with Hinged Cover Stainless Steel Latch, IP67 Dustproof Waterproof $38.90

Sponsored
$3890
current price $38.90VEVOR Outdoor Electrical Junction Box, 13.78 x 9.84 x 5.90 in, ABS Plastic Electrical Enclosure Box with Hinged Cover Stainless Steel Latch, IP67 Dustproof Waterproof
14 out of 5 Stars. 1 reviews
VEVOR Outdoor Electrical Junction Box, 20.87 x 16.92 x 7.87 in, ABS Plastic Electrical Enclosure Box with Hinged Cover Stainless Steel Latch, IP67 Dustproof Waterproof $74.99

Sponsored
$7499
current price $74.99VEVOR Outdoor Electrical Junction Box, 20.87 x 16.92 x 7.87 in, ABS Plastic Electrical Enclosure Box with Hinged Cover Stainless Steel Latch, IP67 Dustproof Waterproof
LINKPAL Electrical Boxes, 3PK Junction Box Outdoor 3 Way Waterproof IP68 Electrical Cable Connector, M16 Wire Range(3.5-10mm),Suitable for Repair and Extend Power Cables, UL From $12.98

3 options
Available in additional 3 optionsFrom$1298
LINKPAL Electrical Boxes, 3PK Junction Box Outdoor 3 Way Waterproof IP68 Electrical Cable Connector, M16 Wire Range(3.5-10mm),Suitable for Repair and Extend Power Cables, UL
GOOHOCHY Outdoor Extension Cord Waterproof Junction Box Office $6.39

$639
current price $6.39GOOHOCHY Outdoor Extension Cord Waterproof Junction Box Office
Solar Junction Box Dual Solar Cable Entry Enclosure with 31cm Cable Extension $19.90

$1990
current price $19.90Solar Junction Box Dual Solar Cable Entry Enclosure with 31cm Cable Extension
Best seller Hyper Tough PVC One-gang Box Receptacle Switch/Outlet Electrical Box TD35071Z, 4.25 in X 2.75 in X 2.25 in From $2.24

2 options
Available in additional 2 optionsFrom$224
Hyper Tough PVC One-gang Box Receptacle Switch/Outlet Electrical Box TD35071Z, 4.25 in X 2.75 in X 2.25 in
1144.7 out of 5 Stars. 114 reviews
Save with
Southwire Old Work Octagon Steel Box Extension $9.80

$980
current price $9.80Southwire Old Work Octagon Steel Box Extension
VEVOR Outdoor Electrical Junction Box, 16.93 x 12.99 x 7.09 in, ABS Plastic Electrical Enclosure Box with Hinged Cover Stainless Steel Latch, IP67 Dustproof Waterproof $61.99

Sponsored
$6199
current price $61.99VEVOR Outdoor Electrical Junction Box, 16.93 x 12.99 x 7.09 in, ABS Plastic Electrical Enclosure Box with Hinged Cover Stainless Steel Latch, IP67 Dustproof Waterproof
LINKPAL Electrical Boxes, 3PK Junction Box Outdoor 2 Way Waterproof IP68 Electrical Cable Connector, M16 Wire Range(3.5-10mm),Suitable for Repair and Extend Power Cables, UL From $12.98

Sponsored
From$1298
LINKPAL Electrical Boxes, 3PK Junction Box Outdoor 2 Way Waterproof IP68 Electrical Cable Connector, M16 Wire Range(3.5-10mm),Suitable for Repair and Extend Power Cables, UL
LOLIPPYY Cord Box Extension Safety Junction Box Weather Resistant Dark Green Plastic 1Pack $11.68

$1168
current price $11.68LOLIPPYY Cord Box Extension Safety Junction Box Weather Resistant Dark Green Plastic 1Pack
Solar Junction Box Dual Solar Cable Entry Enclosure with 1ft Cable Extension $19.00

$1900
current price $19.00Solar Junction Box Dual Solar Cable Entry Enclosure with 1ft Cable Extension
Clearance said Outdoor Extension Cord Connection Box Outdoor Connection Box Safety Junction Box $11.29 Was $12.69

Now$1129
current price Now $11.29, Was $12.69$12.69
said Outdoor Extension Cord Connection Box Outdoor Connection Box Safety Junction Box
Clearance WHAMVOX Connection Box Weatherproof Extension Cord Covers For Outside Waterproof Box For Outdoor Electrical Waterproof Box Outdoor Electrical Junction Box $13.32 Was $19.96

Now$1332
current price Now $13.32, Was $19.96$19.96
WHAMVOX Connection Box Weatherproof Extension Cord Covers For Outside Waterproof Box For Outdoor Electrical Waterproof Box Outdoor Electrical Junction Box
3pcs Round Extension Cord Connection Box Multi-hole Connection Box Safety Junction Box $13.93

$1393
current price $13.933pcs Round Extension Cord Connection Box Multi-hole Connection Box Safety Junction Box
PBPBOX 5Pcs Weatherproof Electric Box Black Plastic Junction Box with Sealing Space for Extension Cord Safety $5.02

$502
current price $5.02PBPBOX 5Pcs Weatherproof Electric Box Black Plastic Junction Box with Sealing Space for Extension Cord Safety
Carlon Non-Metallic Multi-Gang Outlet Box Extension B1MGEXT-2 $10.59 Was $27.29

Now$1059
current price Now $10.59, Was $27.29$27.29
Carlon Non-Metallic Multi-Gang Outlet Box Extension B1MGEXT-2
Soimiss Electrical Extension Cord Box with Water Resistant Seal for Outdoor Use $6.76

$676
current price $6.76Soimiss Electrical Extension Cord Box with Water Resistant Seal for Outdoor Use
KFFKFF Steel Electrical Box 20” x 16” x 6” Electrical Enclosure Box, Carbon Steel Hinged Junction Box $114.88 $114.88/ca

Sponsored
$11488
current price $114.88$114.88/ca
KFFKFF Steel Electrical Box 20” x 16” x 6” Electrical Enclosure Box, Carbon Steel Hinged Junction Box
Save with
KFFKFF Steel Electrical Box 24” x 16” x 10” Electrical Enclosure Box, Carbon Steel Hinged Junction Box $123.99 $123.99/ca

Sponsored
$12399
current price $123.99$123.99/ca
KFFKFF Steel Electrical Box 24” x 16” x 10” Electrical Enclosure Box, Carbon Steel Hinged Junction Box
Carlon Junction Box 32 Cu In Pvc 2 Gang Blue Bulk $7.95 Was $28.65

Now$795
current price Now $7.95, Was $28.65$28.65
Carlon Junction Box 32 Cu In Pvc 2 Gang Blue Bulk
Wiremold Box Extension 1 Gang - Rectangle PVC Electrical Box Extension - 4.75" White $13.88

$1388
current price $13.88Wiremold Box Extension 1 Gang - Rectangle PVC Electrical Box Extension - 4.75" White
unbranded Extension Cables Outdoor Safety Junction Box Plastic 1Set Electric Connection Safety $8.50

$850
current price $8.50unbranded Extension Cables Outdoor Safety Junction Box Plastic 1Set Electric Connection Safety
Medium Outdoor Electrical Box (10.3 x 5.9 x 3.7 in),IP54 Waterproof Extension Cord Connection Box with 6 Cable Entry Ports,Large Weatherproof Outlet Cover for Power Strip,Holiday Lights,Plug&Timer $29.40

$2940
current price $29.40Medium Outdoor Electrical Box (10.3 x 5.9 x 3.7 in),IP54 Waterproof Extension Cord Connection Box with 6 Cable Entry Ports,Large Weatherproof Outlet Cover for Power Strip,Holiday Lights,Plug&Timer
Clearance Junction Box, Plastic Outdoor Waterproof IP68 3 Way Plug Line M686 Cable Connector Electrical External Power Cord Terminal Boxes Was $8.84

Junction Box, Plastic Outdoor Waterproof IP68 3 Way Plug Line M686 Cable Connector Electrical External Power Cord Terminal Boxes
15 out of 5 Stars. 1 reviews
Save with
Medium Outdoor Electrical Box (10.3 x 5.9 x 3.7 in),IP54 Waterproof Extension Cord Connection Box with 6 Cable Entry Ports,Large Weatherproof Outlet Cover for Power Strip,Holiday Lights,Plug&Timer $29.40

$2940
current price $29.40Medium Outdoor Electrical Box (10.3 x 5.9 x 3.7 in),IP54 Waterproof Extension Cord Connection Box with 6 Cable Entry Ports,Large Weatherproof Outlet Cover for Power Strip,Holiday Lights,Plug&Timer
KONTONTY Outdoor Junction Box White Plastic for Extension Cord Safety and Storage $11.74

$1174
current price $11.74KONTONTY Outdoor Junction Box White Plastic for Extension Cord Safety and Storage
Reduced price 5pcs Waterproof Plastic Electric Project Case Junction Box 55x35x15mm $7.26 Was $8.07

Sponsored
Now$726
current price Now $7.26, Was $8.07$8.07
5pcs Waterproof Plastic Electric Project Case Junction Box 55x35x15mm
Save with
VEVOR Outdoor Electrical Junction Box, 11.81 x 7.87 x 7.08 in, ABS Plastic Electrical Enclosure Box with Hinged Cover Stainless Steel Latch, IP67 Dustproof Waterproof $35.90 Was $39.99

Sponsored
Now$3590
current price Now $35.90, Was $39.99$39.99
VEVOR Outdoor Electrical Junction Box, 11.81 x 7.87 x 7.08 in, ABS Plastic Electrical Enclosure Box with Hinged Cover Stainless Steel Latch, IP67 Dustproof Waterproof
Clearance WASHWEPE Electrical Box Waterproof Junction Box White ABS 2Set $6.95 Was $8.93

Now$695
current price Now $6.95, Was $8.93$8.93
WASHWEPE Electrical Box Waterproof Junction Box White ABS 2Set
Safety Outdoor Extension Lead Waterproof Junction Box $8.96

$896
current price $8.96Safety Outdoor Extension Lead Waterproof Junction Box
Thomas & Betts Drawn Square Box Extension 53151-S - Durable Steel - 4" x 4" $11.36

$1136
current price $11.36Thomas & Betts Drawn Square Box Extension 53151-S - Durable Steel - 4" x 4"
Troglfold Connection Box Outdoor Junction Box Extension Cord Cover Waterproof Plug Socket Protection,7.87"X2.56"X2.56"

Troglfold Connection Box Outdoor Junction Box Extension Cord Cover Waterproof Plug Socket Protection,7.87"X2.56"X2.56"
11 out of 5 Stars. 1 reviews
FRCOLOR Weatherproof Outdoor Waterproof Junction Box Office $8.09

$809
current price $8.09FRCOLOR Weatherproof Outdoor Waterproof Junction Box Office
Solar Junction Box Dual Solar Cable Entry Enclosure with 1ft Cable Extension $20.24

$2024
current price $20.24Solar Junction Box Dual Solar Cable Entry Enclosure with 1ft Cable Extension
ETEREAUTY Extension Cord Connection Box Safety Junction Box Plastic 1Set Outdoor Design $10.62

$1062
current price $10.62ETEREAUTY Extension Cord Connection Box Safety Junction Box Plastic 1Set Outdoor Design
Electrical Junction Box, Outdoor Waterproof Box Junction Box with Reserved Holes,ABS Plastic Project Box Power Cord Enclosure for Electronics,2.16x1.37x0.59" inch Waterproof Junction Box,Black

Electrical Junction Box, Outdoor Waterproof Box Junction Box with Reserved Holes,ABS Plastic Project Box Power Cord Enclosure for Electronics,2.16x1.37x0.59" inch Waterproof Junction Box,Black
Reduced price JISADER Outdoor Electrical Box Power Strip Case Wear Resistant Multipurpose Junction Box Weatherproof for Workshop Home Shopping Mall 17.9cmx10cmx25.3cm From $17.99

2 options
Available in additional 2 optionsFrom$1799
JISADER Outdoor Electrical Box Power Strip Case Wear Resistant Multipurpose Junction Box Weatherproof for Workshop Home Shopping Mall 17.9cmx10cmx25.3cm
GETAJGHSD 1Set Green Rectangular Junction Box for Electrical Equipment with 11.8x4.3x2.9in Size $15.80 Was $19.32

Now$1580
current price Now $15.80, Was $19.32$19.32
GETAJGHSD 1Set Green Rectangular Junction Box for Electrical Equipment with 11.8x4.3x2.9in Size
WASHWEPE Electric Junction Box 2Pcs Square White for Indoor and Outdoor Use with Sealing Function $8.93

$893
current price $8.93WASHWEPE Electric Junction Box 2Pcs Square White for Indoor and Outdoor Use with Sealing Function
Electrical Box, Outdoor Waterproof Box IP65 Junction with Reserved Holes,Project Power Cord Enclosure Black $13.84

$1384
current price $13.84Electrical Box, Outdoor Waterproof Box IP65 Junction with Reserved Holes,Project Power Cord Enclosure Black
15 out of 5 Stars. 1 reviews
KALLORY Outdoor Electrical Junction Box in Galvanized Iron for Secure Storage Silver Color $9.55 Was $11.53

Now$955
current price Now $9.55, Was $11.53$11.53
KALLORY Outdoor Electrical Junction Box in Galvanized Iron for Secure Storage Silver Color
BESTOYARD Outdoor Plastic Junction Box with Cover for Extension Cord Safety $5.86

$586
current price $5.86BESTOYARD Outdoor Plastic Junction Box with Cover for Extension Cord Safety
RENACLIPY Extension Cord Covers Outside Safety Junction Box Waterproof Plastic 1Pack $11.66

$1166
current price $11.66RENACLIPY Extension Cord Covers Outside Safety Junction Box Waterproof Plastic 1Pack
Beaupretty White Weatherproof Outdoor Junction Box for Extension Cord Safety Cover $11.28

$1128
current price $11.28Beaupretty White Weatherproof Outdoor Junction Box for Extension Cord Safety Cover
Junction Box Outdoor Waterproof Electrical Box,3 Way Plug Line Plastic External Junction Box,Electric Power Cord Boxes $10.07 Was $11.85

Now$1007
current price Now $10.07, Was $11.85$11.85
Junction Box Outdoor Waterproof Electrical Box,3 Way Plug Line Plastic External Junction Box,Electric Power Cord Boxes
Popular in Extension Junction Box
Related Products
Outdoor Waterproof Junction Box Surfaces Mounted Underground Electrical Junction Box Cable Connectors Easy to Install
Outdoor Waterproof Junction Box Surfaces Mounted Underground Electrical Junction Box Cable Connectors Easy to Install$21.21current price $21.21Outdoor Junction Box 2 Way Plug Line Underground Electrical Junction Box Cable Connector
Outdoor Junction Box 2 Way Plug Line Underground Electrical Junction Box Cable Connector$10.97current price $10.97Plastic Outdoor Electrical Connection Box Waterproof Connection Cable Enclosure
Plastic Outdoor Electrical Connection Box Waterproof Connection Cable Enclosure$34.10current price $34.10LOLIPPYY 1Pc Outdoor Waterproof Cord Junction Box with Reinforced Material in Black
LOLIPPYY 1Pc Outdoor Waterproof Cord Junction Box with Reinforced Material in Black$10.29current price $10.29Southwire 52C18-UPC 4 x 0.75 in. Steel Metallic 2-Gang 2-Device Square Cover
Southwire 52C18-UPC 4 x 0.75 in. Steel Metallic 2-Gang 2-Device Square Cover$7.95current price $7.951PC Southwire Weatherproof Round Box Cover
1PC Southwire Weatherproof Round Box Cover$11.99current price $11.99Hubbell Wiring Device-Kellems Deep Extension Box,Ivory,Steel,Boxes HBL5751AIVA
Hubbell Wiring Device-Kellems Deep Extension Box,Ivory,Steel,Boxes HBL5751AIVA$24.40current price $24.40Square D Homeline HOM816L125PC Load Center, 125 A, 8 -Space, 16 -Circuit, Main Lug, NEMA 1 Enclosure, Gray
Square D Homeline HOM816L125PC Load Center, 125 A, 8 -Space, 16 -Circuit, Main Lug, NEMA 1 Enclosure, Gray$74.27current price $74.27Carlon HB1DP Duplex Handy Box Cover, PVC - Quantity 25
Carlon HB1DP Duplex Handy Box Cover, PVC - Quantity 25$50.65current price $50.65Wiremold Three Gang Box Fitting,Ivory,Steel V5748-3
Wiremold Three Gang Box Fitting,Ivory,Steel V5748-3$48.63current price $48.63Hoffman A12R124 NEMA 3R Enclosure, Screw Cover, Galvanized, Paint Finish
Hoffman A12R124 NEMA 3R Enclosure, Screw Cover, Galvanized, Paint Finish$59.20current price $59.20Arlington EB0708 Heavy-Duty Non-Metallic Enclosure Box 7" x 8" x 3.5"
Arlington EB0708 Heavy-Duty Non-Metallic Enclosure Box 7" x 8" x 3.5"$36.30current price $36.30Wiremold GFCI Box Fitting,Ivory,Steel V5744
Wiremold GFCI Box Fitting,Ivory,Steel V5744$30.74current price $30.74











