Language and regionEnglish · United StatesUS
Grid-down essentials

The cables and small gear that make backup power usable.

A battery alone is not a complete setup. Plan how power reaches each appliance, how you measure the load and how you keep the route safe.

Extension lead prepared beside portable backup equipment
Power source → cable → protected connection → appliance
Start hereList the appliances, note the furthest distance and size the cable for the highest simultaneous load.
Extension-cord finder

Choose the cable before you need it.

Enter the highest load that may run through this one cord—not the power station’s maximum output.

Cable profile14 AWG · outdoor-rated
Estimated current
8.3 A
Estimated cable loss
2.1 V · 1.7%
Regional ceiling used
15 A
  • Use one correctly rated cord; do not daisy-chain leads.
  • Keep plugs and sockets dry and protected from foot or vehicle traffic.
  • Test RCD/GFCI protection with your exact power source; floating-neutral inverters may need manufacturer-specific guidance.

Planning aid only: verify the cord’s printed rating, plug standard and the manuals of every connected product.

The complete route

Eight small product groups worth planning.

These are practical technical categories. Open the matching tool and verify the exact regional specification before use.

Source-checked examples

Start with the right regional product type.

These examples are a filtered technical reference. Confirm the exact regional model, rating, certification and manual before relying on one.

Product group
Outdoor extension cordUS/CA

Southwire
12/3 SJTW 50ft Outdoor Extension Cord

50ft · 12/3 SJTW15A · 125V · NEMA 5-15
Conductors
12/3
Length
50ft / 15.24m
Certification
UL/CUL listed

A shorter heavy-gauge North American outdoor route for loads within its 15A rating.

Outdoor extension cordUS/CA

Southwire
12/3 SJTW 100ft Outdoor Extension Cord

100ft · 12/3 SJTW15A · 125V · 1,875W
Conductors
12/3
Length
100ft / 30.48m
Plug
NEMA 5-15P

A long North American outdoor route where 12-gauge conductors help control voltage drop.

Battery CO alarmUS/CA

Kidde
COB10 Carbon Monoxide Alarm

10-year sealed batteryIndependent of outlet power
Power
Sealed battery
Battery life
10 years
Backup role
No outlet required

A North American battery alarm that remains active when utility power is unavailable.

Cable protectorGlobal

Defender
XPRESS 100 Cable Protector

1 channel · 100 × 30mmIndoor/outdoor · 4.2kg module
Channel
100 × 30mm
Module size
1005 × 250 × 40mm
Temperature
−30 to 60°C

Protecting a cable crossing where people walk and a clearly visible, modular cover is appropriate.

Home outage kit with lighting and backup supplies
Pack before the outage

Build one labelled kit—not a drawer full of unknown cables.

  • Label each cable with its maximum load and intended appliance.
  • Store adapters, light, meter and instructions together.
  • Test the full route under a normal load before relying on it.
FAQ

Questions people ask before use.

Can any extension cord handle a power station?+

No. The printed current or watt rating, conductor size, length, plug standard and indoor/outdoor rating all matter. The lowest-rated part limits the route.

Why must a cable reel be unwound?+

A tightly wound cable cannot lose heat as easily. Under a substantial load this can overheat the reel, so follow its printed wound and unwound ratings.