Cable Size Guide Johannesburg

Getting a fair price for cable size guide in Johannesburg shouldn't take a day of phone calls to wholesalers and contractors. Send one request and we pass it to a electrical contractor who serves Johannesburg and the rest of Gauteng. You receive a quote and deal with them directly, at no cost to you.

Cable Size Guide for Johannesburg homes and businesses

Homeowners, farmers and businesses in Johannesburg often need help choosing cable sizes for geysers, stoves, boreholes, outbuildings and solar systems. Registered electricians and cable suppliers across Gauteng can calculate the right size for the load and distance, then quote for supply or a full installation with a COC.

Want to know more first? Our cable size guide guide covers the options, what affects the price and what to check before you order.

Cabling conditions in Johannesburg

Johannesburg has a huge stock of older homes in suburbs like Melville, Parkhurst and Kensington, where original rubber- or VIR-insulated wiring, overloaded circuits and missing earth leakage protection make rewiring and COC inspections common jobs. Much of the city is supplied by City Power, while some areas are fed directly by Eskom. Cable theft and vandalism regularly cause outages, so businesses and complexes often ask about protected routes and backup supply. Inner-city building conversions need new risers and distribution boards, and the rocky quartzite ridges can make trenching slow. Highveld lightning is frequent in summer, so surge protection is worth including in most quotes.

Cross-sections of copper cables from 1.5 mm² to 16 mm² arranged from smallest to largest

Typical cable size guide requests in the area come from:

Homeowners: homeowners size cable for geysers, stoves, air conditioners and new plug circuits
Offices: offices size sub-mains to floor DBs and dedicated circuits for kitchens and servers
Complexes and body corporates: complexes size supply cables to units, gate motors and common-area lighting
Shops and retail: shops size cable for refrigeration, ovens, air conditioning and three-phase supplies
Solar and backup power: solar installers size AC and DC cable for inverter output, batteries and volt drop
Data and network installs: data centres size feeders for UPS systems, racks and cooling with spare capacity

Why get a quote in Johannesburg first?

Agreeing to the first price you hear can cost more than you expect. By requesting a quote for Johannesburg, you can check the cable specification, scope, COC and guarantee, and find a electrical contractor you can call again.

What to include in your request

What the cable will feed (geyser, stove, borehole, sub-DB, inverter)
Breaker size or appliance rating, if known
Length of the cable run in metres
How it will be installed (roof, conduit, underground)
Single-phase or three-phase supply

The more detail you give, the more accurate your quote will be.

Service area: Johannesburg and surrounds

Contractors on our network work in Johannesburg and surrounding areas, including Rosebank, Melville, Soweto, Booysens, Bedfordview, Parktown, Ormonde. Many have their own trenching and testing equipment, and some also cover the rest of Gauteng, which suits developers and businesses with sites in more than one town.

Frequently asked questions

How much does cable size guide cost in Johannesburg?

It depends on the cable size and length, the ground or building the cable runs through, terminations, testing and travel. Send the form with the details and an electrical contractor serving Johannesburg will quote you.

Will the contractor in Johannesburg issue a COC?

Fixed electrical work must be done or supervised by a registered electrician, who tests it and issues a Certificate of Compliance under SANS 10142-1. Ask for the COC to be included in your quote from the Johannesburg contractor.

How soon can the work start?

Small jobs can often be done within days. Long trenches, large cable sizes that must be ordered on drums, and work that needs a municipal wayleave take longer. Ask for the lead time in your quote.

Cable Size Guide in Johannesburg