Table of Contents
Advertisement
CONNECTIONS aND CONNECTORS
The connectors used on REC solar panels are specified in the panel characteristics at the rear of this manual. The connector IP rating is only valid when the they
are correctly connected. all connectors and cables must be secure and tight as well as electrically and mechanically sound. UV-resistant cables and connectors
approved for outdoor use must be used. Conductor gauge must be chosen to ensure DC power losses (voltage drop) are kept to a minimum (<1%).
Observe all local regulations when selecting cables. For string connections, use minimum 12 aWG (4 mm
operating temperature of 194°F (90°C). Secure cables using UV-resistant cable ties or other device. Loose and unsecured cables must be protected
from damage (e.g., mechanical, abrasion, sharp objects, animals). avoid exposing cables to direct sunlight and permanent tension.
In order to ensure durable and safe connections between panels and BOS equipment, the following instructions must be followed in order to protect the
electrical connections from the elements. More detailed information is given in the Guide to Best Practice - Connections and Connectors which can be
found via the REC online Download Center (www.recgroup.com/downloads).
Safety is paramount when working with electrical connectors. Ensure that any installation work is not carried out on live or load-carrying parts. Connections
must not be disconnected under load and the system must be isolated from the grid before carrying out any maintenance or repair work.
connEctors
The exact connector type used on REC solar panels is indicated in the product specifications at the rear of this manual. The stated IP rating is only valid
when correctly mated. To ensure connector compatibility and reduce the potential for damage to the modules and the installation, mated connectors
must be from the same manufacturer and of the same (i.e., mateable) connector type and system rating. Connections may also be made using connectors
that are certified as mateable.
Some countries and/or regions have specific regulations regarding the mating of connectors. Installers are responsible for ensuring the
compliancy of the system with such local regulations.
The cutting of cables is only permitted in order to replace a factory-installed connector with another brand of connector to ensure 'like-
for-like' mating when connected to a non-REC external device. All other changes are prohibited and will invalidate the REC warranty. The
connector replacement procedure must be carried out by the installer correctly and according to the replacement connector manufacturer's
instructions. The selected replacement connector must also fulfil all relevant technical specifications and be certified according to
applicable standards (e.g., EN 50521, IEC 62852 or UL 6703) so as to ensure they are fit for purpose and safety. The REC warranty does not
extend to cover any fault traceable to the replaced connectors.
•
The correct and secure connection of connectors is identified by a firm click once inserted,
•
Use of any chemicals or lubricants on the connectors or contacts may only be carried out in line with the connector manufacturer's instructions.
Any other modification to the panel is prohibited, including the opening of the junction box, unless explicitly authorized by REC. Doing so
will invalidate the warranty.
ProtEctIng tHE cablEs
•
To prevent stress on the junction box casing, ensure the cable exits the junction box in a straight line before any bend in the cable.
•
The cables on
REC solar
Fig. 11: Minimum cable bend radius
•
Ensure cables do not hang loose where they may be damaged through friction or stress, e.g., caused by wind or grazing animals,
•
Shield connectors from falling or dropping water by locating them directly beneath a panel,
•
Cables must be firmly secured to the structure, without over-tightening, as this can deform the cable insulation.
sEcurIng cablEs and connEctors
•
When securing the connector, place it so that it has with sufficient air circulation all around. This allows the connector to dry effectively and avoids
the risk of damage or degradation of the connection,
•
Good practice is to secure the cable either side of the connectors, ensuring no stress is exerted on the connector casing or cable entry.
To enable correct cooling and drying of the connectors, do not add extra protection to the connector, e.g., heat shrink, grease or tape.
panels have a minimum bending radius of 1.2 in (30 mm) to avoid damage to the insulation (fig. 11).
< 2.4 in >
< 60 mm >
) or copper wires insulated for a maximum
2
REC Installation Manual - N-Peak - UL 1703
Rev A.2 - 11.18
Ref:
NE-06-22
11
Advertisement
Table of Contents
