PV SYSTEM CEC 690 and AMP
General
- Residential 1-2 family dwelling – max 600 volts
- PV module model #, quantity, and location according to plan
- Work done in a neat, workmanlike manner
- Array mounting system and structural connections to plan
- Roof penetrations flashed/sealed
- Firefighter access to plan
- Emergency egress/rescue openings path of travel 36” wide
- Access and working space for PV equipment
- A valid permit and plans must be on-site R106.3.1
Conductors
- Ampacity and wire size
- Exposed single conductor wiring is 90C, wet rated, and sunlight resistant type USE-2 or approved/listed PV wire
- If wiring is in a conduit, it is 90C, wet rated type RHW-2, THWN-2, or XHHW-2
- Conductor insulation is rated at 90C to allow for operation at 70C+ near modules
- Grounded conductor IDed white or gray
- PV conductors grouped and IDed
Main Service Panel Interconnection
- 2-Pole Breaker
- Over-current device type/size per plan
- Labels on panels. DC conduit every 20’ and 1 at eye level
- The panel must be labeled
- Conduit secured 3’/10’
Bonding & Grounding
- A complete GES installed
- Modules and racking systems are bonded and grounded per manufacturer instructions
- Properly sized EGC is routed with circuit conductors
Over-current Protection
- OCPD in DC circuits listed for DC
- OCPD per plans
- PV output OCPD is located at the opposite end of the bus from the feeder connection
- 20% rule: 100 amp svc ≤ 20 amp PV breaker
Disconnects
- Disconnect handles ≤ 6’7” – blade lockable
- Disconnects according to plan and located as req by CEC and AMP
- Disconnects used in DC circuits are listed for DC operation and located per AMP
- Disconnects are installed for PV equipment. NOTE: For inverters and other equipment energized from > 1 source, disconnecting means must be grouped and identified per AMP req
- AC Disconnect ≤ 10’ and in sight of main meter panel per AMP
- DC Disconnect and inverter at grade level (unless micro inverters are used)
PV Source/output Circuit Conductor Management
- Cables secured every 4.5′
- Cables secured within 12″ of the box, cabinet, conduit body, or other termination
- Cable closely follows the surface of the building finish or on running boards
- Exposed single conductors, protected where subject to physical damage
Signs & Labels
- All int/ext DC conduit, enclosures, raceways, cable assemblies, junction boxes, and disconnects are marked
- Markings on the conduits, raceways, and cable assemblies every 10′, within 1′ of turns/bends, and within 1′ above and below penetrations of roof/ceiling assemblies, walls, and barriers
- Marking is placed adjacent to the main service disconnect in a location that must be visible from where the disconnect is located
- The markings say “WARNING: PHOTOVOLTAIC POWER SOURCE” and have 3/8″ minimum-sized white letters on a red background. The signs are made of reflective weather-resistant material
- Where PV circuits are embedded in built-up, laminate, or membrane roofing materials in roof areas not covered by PV modules and associated equipment, the location of circuits must be marked