- Reaction score
- 148
Hi Guys found this in a Ariston 9.5kw Water heater instructions quote ''The product should be connected only to a supply with the relevant system impedance no more than 0.237 ohm. Restrictions to connection may be imposed by the supply authority on the use of equipment in the actual relevant system impedance at the interface point on the user's premise exceeds 0.237 ohm. '' Open to takers!