How to choose
Choose by total load, environment, cable route and reel condition rather than socket count.
Quick answer
Add the connected loads and treat the marked current as an aggregate limit. Check indoor/outdoor suitability, cable length and route, then follow the exact reel’s wound and unwound loading instructions.
Scope: Use the nation-specific building rules and a competent registered electrician where work is notifiable, fixed-wiring work or otherwise beyond safe user checks.
Four options to compare
Best for: One or a few modest loads near a fixed socket.
Main trade-off: More sockets do not increase the total permitted load and trailing cable creates a trip route.
Must check: Aggregate watts/amps, lead condition, plug access and cable route.
Best for: Reaching a task without joining several extensions.
Main trade-off: Longer cable adds voltage drop, damage exposure and storage burden.
Must check: Exact cable rating, tool starting load and protection arrangement.
Best for: Longer temporary reach with managed storage.
Main trade-off: A wound reel can have a lower permitted load because heat cannot dissipate.
Must check: Marked wound/unwound rating and complete unwinding where required.
Best for: Damp/exposed use or a recurring need that should not depend on a domestic extension.
Main trade-off: May require purpose-designed equipment or competent electrical work.
Must check: Stated IP/environment rating, RCD arrangement and whether a fixed socket is the safer long-term answer.
Use the nameplate input for every connected item and allow for the exact product instructions. Do not multiply a 13 A marking by the number of sockets.
Repeated daily reliance, doors closing on cables, daisy-chaining or heat damage are signals to stop and address the supply properly.
What this guide cannot check
Do not claim universal safety, guaranteed suitability, professional approval or permission to undertake protected work. Check current instructions, exact identifiers and local circumstances before acting.