Aleo P18 Quick Reference Manual - Page 9

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9.2

Laying the string cables

9.2

Laying the string cables

CAUTION!

Brittle fractures in junction boxes due to contact

with unsuitable connection cables: Risk of fire!

• Only use connection cables without plasticisers.

_______________________________________________

NOTE

• Avoid any tensile and pressure loads on the junction

box when mounting.

• When mounting, avoid heavy tensile loads on any

box when mounting.

connectors already plugged in.

• When mounting, avoid heavy tensile loads on any

connectors already plugged in.

NOTE

• Bend the cables from the connector at least 4 cm

NOTE

after they exit from the connector.

• Bend the cables from the connector at least 4 cm

• Bend the cables from the junction box as well, at

after they exit from the connector.

least 4 cm after they exit from the connector.

• This keeps the cables waterproof at the cable outlet.

• Bend the cables from the junction box as well, at

least 4 cm after they exit from the connector.

Observe the guidelines on laying the respective cables. Lay

all cables ensuring that:

• This keeps the cables waterproof at the cable outlet.

Observe the guidelines on laying the respective cables. Lay

• You adhere to the minimum bend radius (e.g. 5-fold

cable diameter2).

all cables ensuring that:

• You avoid laying near sharp corners and edges or

• You adhere to the minimum bend radius (e.g. 5-fold

protect the cables accordingly.

cable diameter

• cables must not lay between module backside and

• You avoid laying near sharp corners and edges or

mounting system parts.

protect the cables accordingly

• You protect them from direct sunlight and preci-

• You protect them from direct sunlight and precipi-

pitation.

tation

• You secure the cables with UV resistant cable clips

or other suitable cable fasteners which protect the

• You secure the cables with UV resistant cable clips

cable insulation.

or other suitable cable fasteners which protect the

• Cables from module strings are laid as near to each

cable insulation,

other as possible to minimise the effects of being

• Cables from module strings are laid as near to each

struck by lightning.

other as possible to minimise the effects of being

struck by lightning

9.2.1 Weather protection

NOTE

9.2.1

Weather protection

• Lay the cables so that they exit the junction box

NOTE

from below. This prevents water, which runs along

the cable, from collecting at the point where the

• Lay the cables so that they exit the junction box from

cables exit the junction box.

below. This prevents water, which runs along the ca-

• For modules mounted horizontally, lay the cables

ble, from collecting at the point where the cables

in a U-form away from the junction box.

exit the junction box.

• Modules mounted vertically do not usually need

• For modules mounted horizontally, lay the cables

any additional adjustments.

in a U-form away from the junction box.

• Modules mounted vertically do not usually need

any additional adjustments.

Some countries specify a larger bend radius, e.g. 8-fold wire diameter in the USA (NEC

Codebook 2011).

Some countries specify a larger bend radius, e.g. 8-fold wire diameter in the

USA (NEC Codebook 2011).

For attaching the cable clip, use a suitable tool which can fully tighten at a defined

low force. Avoid cable clips and tools which constrict or damage the cable insulation when

For attaching the cable clip, use a suitable tool which can fully tighten at a de-

tightening.

fined low force. Avoid cable clips and tools which constrict or damage the cable

aleo solar GmbH | Marius-Eriksen-Straße 1 | 17291 Prenzlau | Germany | [email protected]

insulation when tightening.

Quick Reference Manual Rel. 4.2, 08/2015, en-GB-DE (1)

Fig.2

U-form cables at the junction box for a horizontally

Fig.2 U-form cables at the junction box for a horizontally

mounted module

Lay cables carefully to protect against damage from:

• Direct environmental factors, such as precipitation

• movement (e.g. from wind)

• Indirect environmental factors, e.g. snow or ice,

which slip down behind the modules, and

• Chaffing on the insulation due to the cable moving

(e.g. from wind or ice).

9.3

Potential equalisation (earthing) of module

9.3

Potential equalisation (earthing) of module

frames

NOTE

• Local regulations may specify potential equalisation

(earthing).

• When earthing the module frame, establish a safe

electrical connection to the earth potential or

earthed sub-structure.

• Observe the requirements and recommendations

of the inverter manufacturer, as well as insurance

policies.

• The module frames are made of aluminium. When

mounting onto other materials, take suitable measu-

• The module frames are made of aluminium. When

res to prevent electric corrosion, e.g. by using a

mounting onto other materials, take suitable mea-

coating.

sures to prevent electric corrosion, e.g. by using a

coating.

NOTE

Potential equalization does not serve as lightning

protection. Lightning protection may be necessary

Potential equalization does not serve as lightning

in addition to potential equalization.

protection. Lightning protection may be necessary

in addition to potential equalization.

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