Discuss Using SWA cables in parallel in the Industrial Electricians' Talk area at ElectriciansForums.net
Each cable needs the appropriate correction factors applying first before adding together if using in parallel. volt drop and making sure zs is low enough for the protective device needs considering also.What is this supplying? With the info above id lean twoards 2x 95mm 4c
Do you know the mccb max zs from manufacturer, as this may be the big influencing factor to what size cable(s) you need to install as 100meter run and 300 amp supply is rather large.There will be a separate cpc installed to achieve the maximum Zs for the mccb. The supply is for a unit that will be effectively rented so no idea what sort of load it will be.
You need to apply a tolerance of +20% using a mccb for max zs giving a multiplier of 1.2The Ze was 0.09 I'll have a look when I get in the office buts it's a 400A Square D MCCB set at around 0.8 mulitiplyer to give 300A I have a feeling it was 0.37
It's the tripping characteristic of the device.What's the tolerance of 20% for? I'm really thinking the 2x 95mm are going to be a lot easier than a 300mm2
Is it a nsx 400 micro logic 2.3?I have found on their website what they state the maximum Zs at max- 0.968 min- 0.052
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