[Question] Overhead cabling to outside building question

[Jimmy657]

Hi all, hope you are well.

I have a question regarding wiring between my house and an outside building.

Currently I have 16mm flat twin + earth in a 32mm pvc conduit, stretching a span of 4 meters overhead (around 2.5m high).

I would like to make use of this for the feed from the inverter (which will live in the outside building) , and I will get a 10mm earth wire added as well.

I ideally want to leave it as is and duplicate this to add a new 16mm twin flat + earth and 10mm earth wire in its own seperate pvc conduit, right next to the existing one.

My question is basically whether a PVC conduit outdoor between buildings meets the standards? Bearing in mind that this is overhead (out of reach) and not under ground.

Thank you experts, I appreciate your advice and guidance.

Cheers

[GCE]

Without seeing the method of suspension it is not going to be a str answer
I would expect a PVC 32mm conduit to sag unless it is supported somehow

There needs to be no strain on the Twin and Earth and the T&E will also be de-rated due to indirect sunlight and in a sleeve
De-rate the cable by a factor of around 0.57

In short - it would need to be correctly supported to prevent sagging and CB size rated according to thermal effect - Probable not a good idea

5.3.4 Type of wiring and methods of installation
The type of wiring and methods of installation shall be determined after
consideration of the following:
a) the location (also consider intentional or inadvertent damage);
b) the nature of the building elements for supporting the wiring;
c) the accessibility of the wiring to persons and livestock;
d) the voltage;
e) the electromechanical stresses and thermal effects likely to occur as a
result of short-circuits; and
f) stresses imposed on the wiring during installation and in service.

6.3.4 Aerial conductors
6.3.4.1 An aerial conductor shall be of
a) hard-drawn copper,
b) stranded aluminium, or
c) composite construction, such as steel-cored aluminium.
6.3.4.2 A surge protective device should be installed at each end of each
aerial conductor circuit in an installation (see 6.7.6).
The arrangement, support and, where required, insulation of an aerial
conductor shall comply with the relevant statutory requirements.

[Jimmy657]

Thank you very much! Much appreciated