For contractors & specifiers
Spec the right SPD in under a minute.
Match the device to the board, the earthing system and the real risk — load-shedding switching surges, solar inverters, lightning. SANS 10142 / 61643 aligned, with engineers a WhatsApp away to confirm.
- §SANS 10142-1 wiring code aligned
- ☀Solar / hybrid DC + AC ready
- ⚡Load-shedding switching-surge rated
- ✓Spec sign-off support on WhatsApp
SPD selector
Which SPD does this install need?
Recommended
Type 1+2 at the origin
With an external LPS or overhead line, the origin needs lightning-current duty. A combined Type 1+2 arrester covers it in one device — that's the PZ-B family, in NRCS listing now.
Guidance only — final selection per SANS 10142-1 and a site risk assessment.
Designed for SA conditions
The risks your installs actually face
Load-shedding switching
Every grid restoration and generator changeover throws a switching surge at the board. Type 2 SPDs at sub-boards keep electronics alive through the cycling.
Solar & hybrid
Grid-tie inverters and battery systems add surge paths on both AC and DC sides. Specify protection at the inverter AC connection and the main board.
Highveld lightning
Gauteng sees some of the world’s highest ground-flash density. Where there’s an LPS or overhead line, Type 1 / 1+2 at the origin is non-negotiable.
Specifying a board? We’ll confirm the SPD.
Request a spec pack for your project, or send the SPD code straight to the engineers on WhatsApp. We reply within one business day.