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Grae79 · 13-03-2008

for 105m i get 1.36Ω for Zs...which is OVER the max. of 1.2Ω (1.15Ω for 17th). using a TN-C-S supply and a 32A type B 60898.

therefore the length of the circuit would need to be reduced to bring it into compliance with the max Zs. (would do the math but have had one of those days

)

Max circuit length to comply with both voltage drop and Zs is: 88.6m (83.4m for 17th)

13-03-2008	#4 (permalink)
Grae79 Senior Member Join Date: Jan 2008 Posts: 245	Re: 32A ring for 105m i get 1.36Ω for Zs...which is OVER the max. of 1.2Ω (1.15Ω for 17th). using a TN-C-S supply and a 32A type B 60898. therefore the length of the circuit would need to be reduced to bring it into compliance with the max Zs. (would do the math but have had one of those days ) Max circuit length to comply with both voltage drop and Zs is: 88.6m (83.4m for 17th)
Grae79 Senior Member Join Date: Jan 2008 Posts: 245	Last edited by Grae79; 15-03-2008 at 10:04 AM.