Browse Forums General Discussion 1 Aug 20, 2009 6:15 pm Hi Everyone, Currently looking at fitting a swimspa and need extra power for system. My house has a 80amp 500V breaker in meter box outside and inside the meter board has a main switch with markings M63m 250V ~ 80A x. board is filled with 4 X 16A power, 2 X 10A lights, 1 X 16A water heater, 1 X 25A shed, 1 X 10A smoke detectors, 1 X 16A evap aircon, 1 X 20A Split system air con for 1 room, 1 X 20A wall oven, 1 X 20A hot plates. The RCD sits in the middle taking up a couple of spots. Board is full with no more room. Now the swim spa from Specialised swim spas and pools has 2 X 3.0 Hp 12.5 Amp pumps 2 X 1.5Hp 8.5 Amp pumps, 6KW 25Amp electric heater, 1.0AMP Ozone generator, 5 AMP Air blower. All this is connected to a Genius IV and Plus IV controllers. They recommend a couple of circuits, Circiut 1 20Amp for heater, 1X 8.5amp filter, ozone and air blower. 2nd circuit 32amp for the 2x 12.5 amp and 1x 8.5amp pumps. Now the original heater was gas at 1.5Amps, I have replaced this with the 6kw 25amp heater. I have had a couple of sparkies come around so far with different ideas. 1st one said to upgrade 25Amp shed breaker to 32amp on existing 4mm wire. Then upgrade one of the existing house external 16amp power points to 20amp for the second circuit. ( The system may be installed in my existing 20 X 30 shed at the moment or outside, shed has power board with 2X 20amp power and 1X 10amp light breakers). 2nd sparky said he could replace RCD spot with 2X 16amp rcd breakers and convert rest on that circiut to rcd as well to give 1 dedicated 32amp line and thats all the board inside will allow. Or fit new power board next to outside meter box and tap in to that to give a 32amp dedicated line. What i forgot to ask him is is it possible to install an extra 25amp line with the 32amp from the new power board or am i still restricted to max 32amps. Sorry for the long drawn out story. Any help would be much appreciated Cheers. Paul. Re: House Wiring Upgrade 2Aug 22, 2009 8:57 am Safest and best way: Upgrade your board and supply. For example when you build a new home, your elec provider will ask your sparky to determine the "load requirements" From your description you are getting load heavy. Dedicated circuits with RCD protection always afford the best long term solution and always remember its better to allow for future load increase, we call this "provision". Hope this helps Pete, registered builder. Hi, This is my first post. We are planning to buy new home via House and Land (H&L) Package around Boxhill/Gables/Marsden Park in Syndey. Googled reviews for most of… 0 10448 Very good points. Thanks so much ponzutwo for your advice. Appreciate it. 2 10326 Hi all, Trying to workout the minimum stepdown required between slab for my house and the outdoor alfresco area. Garage is 100mm lower than rest of the house and plan was… 0 3651 |