7
Figure 19
Series connection
Parallel connection
Junction box
Carry out installation and wiring work in compliance with all relevant health, safety and environment laws and regulations.
Diagram showing standard module cabling with obstruction
If obstructions make it impossible to connect modules directly side-by-side, the plugs and sockets provided can be used to bridge gaps. A simple example is shown in
Figure 20:
Roof window
Extension Cable
Figure 20
good
not good
Fasten the sealing caps with a
fastening torque of 1.7 Nm.
Check that there is no gap
between the sealing cap and the
connector or socket.
Figure 16
5.3.3
Grounding
Grounding cautions
•
Be aware of the necessary grounding requirements prior to installation. Your local
authorities can help you further.
•
Install arrestors, surge absorbers or any other appropriate lightning protection tools
as needed.
•
Module frames, mountings, connection boxes and metal conduits should be
connected to an earth ground as lightning protection, in accordance with local,
regional and national standards and regulations.
•
Holes (d 4 mm, 0.16 in) are provided in the aluminium frame of the SF module to
accommodate grounding. The grounding cable must be attached to the module
frame with a screw and washer. There must be an electrical contact. Use a copper
grounding cable with a cross section of at least 2 mm² (AWG14) and a temperature
range of at least -40 to 85 °C.
•
Alternatively, it is possible to use grounding lugs with integrated grounding pin,
lock washers and grounding clips or brackets for PV modules as per NEC Section
250. These components must be used in compliance with the grounding device
manufacturer's guidelines. Consult the grounding device manufacturer to identify
the appropriate grounding and bonding device for your mounting structure or
design.
For alternative grounding methods please consult Solar Frontier.
Connect the grounding cable to the point marked with the electrical earth symbol
.
Please refer to further instructions provided by the screw or bolt manufacturer.
Figure 17
Rolling Thread Screw
Lock Washer
Crimping Terminal
Grounding Cable
PV module frame
Grounding (IEC)
Figure 18
5.3.4
Electrical wiring
•
The SF modules have a connecting cable with one plug for each pole. Use these to connect the module.
•
Do not open the junction box.
•
Fasten the module cable to the frame or to the mounting system in order to avoid any stress to the connector.
•
Cables drooping from the terminal box are hazardous and must be avoided.
•
Cables should be secured so they are not exposed to direct sunlight (such as behind the module).
•
The sum of Voc of modules in series must not exceed the maximum system voltage rating of the module under any condition, even at low temperature.
•
Reverse current applied to the modules should not exceed 7 A under any condition.
•
Minimum cable diameter: 2.5 mm² (0.004 in²).
