11d (edited) • General discussion
SWA on PV installations: compliant, non-compliant, or misunderstood?
Few topics create more confusion than the use of SWA cables on PV installations.
You’ll hear:
- “SWA is never allowed on DC”
- “It’s fine if it’s underground”
- “IEC forbids it”
- “Everyone does it, so it must be OK”
The reality is more nuanced.
Whether SWA is acceptable depends on:
- Which part of the PV circuit it’s used in
- Which standard is being applied (IEC 60364-7-712; IEC 62930; EN 50618, etc.)
- The wiring system and installation method
- How terminations and connectors are handled
There is no blanket yes or no.
Over the next posts, I’ll break this down using:
- IEC 60364-7-712 (installation requirements)
- Cable construction and classification
- Practical site examples where SWA can and cannot be justified
No myths. No bashing.
Just standards and reasoning.
Question to the group:
Where have you seen SWA used on PV systems — and why was it chosen?
See the course on SWA for PV systems
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SWA on PV installations: compliant, non-compliant, or misunderstood?
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