Short answer: your development needs enough electrical capacity for its realistic maximum demand, essential loads and planned growth—not merely the sum of every connected appliance.

Guessing this figure can turn a viable development into an expensive redesign. A professional electrical capacity assessment gives the project team a defensible basis for supply applications, transformers, generators, cable sizes, switchboards and protection equipment.

What determines the required capacity?

The calculation should consider the actual use of the development. Typical inputs include:

• Building type, floor area and occupancy
• Lighting, socket outlets and HVAC
• Lifts, pumps, kitchens and hot-water systems
• Industrial machinery or specialist equipment
• Fire, security, data and life-safety systems
• Solar, battery, UPS and generator arrangements
• Tenant loads and realistic future expansion

Not every item operates at full load simultaneously. Diversity and demand factors must therefore be selected responsibly rather than applied as a convenient blanket percentage.

Why available network capacity matters

Calculating the anticipated demand is only one part of feasibility. The project team must also establish whether the municipality or Eskom can provide the required supply at the proposed point of connection.

If the local network cannot support the development, the project may require a transformer, substation, MV connection, cable extension or upstream network upgrade. Finding this out after architectural and civil designs are advanced can affect the budget, site layout and construction programme.

What should the assessment produce?

A useful capacity assessment should provide a clear maximum-demand calculation, the proposed supply size, major assumptions, future allowance and preliminary infrastructure requirements. Where required, it should also support applications and discussions with the relevant supply authority.

When should it be done?

Carry out the assessment during property due diligence or early feasibility—before committing to major design and construction expenditure. Early answers allow architects, civil engineers, quantity surveyors and developers to coordinate the electrical infrastructure into the project from the beginning.

Do not guess. Calculate before you commit.

Kuyper Electrical Services assists with electrical capacity assessments, MV and LV reticulation, supply-authority coordination, substations, tender documentation and project monitoring throughout South Africa.

Request a professional consultation:
Office: 087 821 6957
WhatsApp: 082 889 0802
Email: admin@kuyperelectrical.co.za