Reasonable job for a DIYer, a bit "quick" for a pro.
Some regs will help you here, from OSG, Brown, 16th BS7671.
1. Armoured cable cleat spacing (p103)
- Armoured 9-15mm - Horizontal 350mm, Vertical 450mm
- Armoured 15-20mm - Horizontal 400mm, Vertical 550mm
- Table 4A - "Spacing of supports for cables in accessible positions"
2. Rigid Conduit clip spacing (p106)
- Rigid 16-25mm - Horizontal 1.5m, Vertical 1.75m
- Table 4C - "MAXIMUM distance between supports for conduits"
The table lists the maximum & does not consider bends.
Bends require more clips to prevent conduit hinging away from wall.
3. Conduit bend radius (p106, Table 4C, Note 3)
- Generally the inner radius should not be less than 2.5x its o.d.
- That is strictly for flexible, but good practice
Conduit bend radius is for ease of drawing cables in.
- 6491X singles <10mm o.d. bend radius typically 2-3x D(iameter), Table 4E p108
- 6491X singles >10mm o.d. bend radius typically 3-4x D(iameter), Table 4E p108
- SWA bend radius typically 8x D(iameter), Table 4E p108
General comments.
Conduit drains...
- Conduit drains back to the CU & SWA Armour point
- You need some drain holes at the lowest point (if not already present)
- This does compromise the IP rating, but not beyond that already (nothing there is splashproof)
Conduit cable...
- I assume 6491X used for conduit singles not stripped flex/FTE?
- 6491X has thicker insulation for conduit applications
Two final circuits sharing conduit...
- Nothing wrong with that - labelling can be helpful (dymo rhino).
SWA...
- Earthing PME is an issue here
- Export PME = Building of wood + raised on wood sleepers + Class-1 tools used + no incoming metal services
- TT & Earth-Rod = Building of concrete or concrete floor or Class-1 tools used or incoming metal services or accessible metal structure in contact with the ground or caravan
Suspect this should really be a TT installation.
- If you decide to TT it, you must make sure there are no drains below
- Not just yours, but other peoples (on your land), railway, etc
PVC glue for conduit
- never apply with cables in place (obviously)
- mostly useless with black conduit in clips as a summer/winter cycle breaks the seal (like black guttering, black plastic expands & contracts enormously with temperature hence the importance of slip joints with long runs of conduit)
- hence a flexible sealant can be more useful
Only real issue is exporting PME earth