Utilities
The boxes, ducts, and cables that move a gas or electricity supply for an extension: external meter boxes, meter tails, service duct bends, and the draw cords left for pulling cable through later.
Duct Bend (Hockey Stick): The Service Duct Sweep That Brings a Supply Out of the Ground
What a hockey-stick service duct bend is, why the radius must be gentle, electric duct sizes and colour coding, how it is laid to DNO spec, and common mistakes.
Duct Draw Cord: The Pull Cord Left in Every Empty Duct, and Why It Matters
UK guide to duct draw cord: the pull cord left in buried ducts and conduit so a cable can be pulled through later, breaking strain, types, and the leave-a-new-cord rule.
External Meter Box: Gas vs Electric, Surface vs Recessed, and How It's Built In
UK guide to the external meter box for a relocated gas or electric meter: box types and sizes, surface vs recessed, building it in, and the long supplier lead times.
Meter Tails: The Heavy Cables Between Your Meter and Consumer Unit
UK guide to 25mm meter tails: standard sizing, the length limit to the consumer unit, who can break the supplier seal, Henley blocks and isolators, and common mistakes.