Cable

[Dylboy]

Hey all.

How can the 6mm PV cable have a great amp rating than GP 6mm ?

6mm GP : 45Amps
6mm Solar Cable from Alvern : 70Amps

I know the PV cable is the coated cable thing so does that increase its amp rating ? Or is it that PV cable is double PVVmC sheathed ?

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[Isetech]

A 4 mm GP cable is rated at 1000VAC - 32 amps single phase and 28 amps 3 phase.

A 4 mm solar cable is double insulated with UV protection and rated to 1800VDC - 55 amps

There are numerous factors to consider, which is why it is always good to check manufacturers specifications.

Sometimes the thickness of the strands and amount of strands will determine the current carrying capacity.

Hey all.

How can the 6mm PV cable have a great amp rating than GP 6mm ?

6mm GP : 45Amps
6mm Solar Cable from Alvern : 70Amps

I know the PV cable is the coated cable thing so does that increase its amp rating ? Or is it that PV cable is double PVVmC sheathed ?

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[Isetech]

When you read crap about other cables being much cheaper and better for the solar applications, make sure you do your homework. There are reasons the cable cost a lot more than other cables.



Cable suitable for the interconnection of the various elements of photovoltaic
systems. Suitable for fixed installation outside and inside without protection or
inside pipes, ducts or similar closed systems. High resistance against ozone, U.V.
rays, oils, moisture and weather inclemencies. Suitable for use at an ambient
temperature up to 90'C (120" overload). The estimated lifetime of these cables is at
least 25 years.

[Isetech]

Flexible tin plated copper class 5 GEI EN 60228, LSOH Rubber compound type G21,
LSOH Rubber Compound type M21. Single core cables, for fhot6voltaic and solar
system use, elastomeric compound insulated and sheathed. Flame retardant,
halogen free, and a low smoke flexible cables for fixed laying, lifetime testing
20.o00h/120"c.

[GCE]

Hey all.

How can the 6mm PV cable have a great amp rating than GP 6mm ?

6mm GP : 45Amps
6mm Solar Cable from Alvern : 70Amps

I know the PV cable is the coated cable thing so does that increase its amp rating ? Or is it that PV cable is double PVVmC sheathed ?

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It will be than likely be because of the type of insulation being used which means that it can run hotter without damage to the insulation

Similar to RVK cable which has a much higher current carrying capacity than normal cable

[Dylboy]

Ahhh ok thanks gents ! Thought Maybe the insulation.

Really appreciate it

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[Dylboy]

I like this Solar PV cable. The Alvern cable is rates at 70A for a 6mm... Opens a few options for cabling when doing inverters such as the 5kw etc. Smaller cable, flexible is a win win for me.

I don't see any things in specs saying not to be used for AC as yet but still looking.

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[Dylboy]

I see there is no mention of AC actually for perhaps not suited for AC. I mean if it can stand 1800v DC then it can do AC but is it against manufactures specs I'm not sure as it does not say not to use on AC...

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[AndyD]

As GCE said, current rating is probably higher because the insulation and sheath can withstand higher temperatures without degrading. If you look at the current rating of silicone insulated cabtyre compared to similar sized PVC cabtyre it's a very big difference for exactly that reason.

Also fine stranded conductors have lower impedance than medium stranded conductors and usually also have a higher current rating. Then there's solid conductors with even higher impedance and usually correspondingly lower current ratings.

[Justloadit]

A side note, any cable that is rated for a DC value, multiply the DC volts by 0.707 to give you the AC rating of the cable. The 0.707 is to convert from RMS to a peak value of the sine wave of the supply.
So a 700V DC rated cable will be able to handle a maximum of 490V AC. Current remains the same same for AC or DC

[Dylboy]

Thanks all ! This has been very interesting indeed

And thank you for the 0.707, forgot about that math stuff and RMS also didn't even think to apply it either so thank you. I will apply that as I enjoy this DF cable as flexible and good properties.

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