normspanners
Member
- Messages
- 8,853
I know about the calcs but he hasnt mention a length but I now see you have based it on a guesstimate
- Thread starter smashweld
- Start date
WorkshopChris
Member
- Messages
- 5,049
- Location
- South East Essex
Thats the issue with converters the normal calcs go out the window as they allow for diversity and constant loads. With converters its almost all about the peak starting volt drop once running they are easy on the power.
The cable sises are described as a square area measurement to work out the outer diametre you need to look at manufactures date sheet and work back.
The cable sises are described as a square area measurement to work out the outer diametre you need to look at manufactures date sheet and work back.
normspanners
Member
- Messages
- 8,853
Although you will suffer volt drop, You dont want to have any if possible, to give everything as much chance to start as you can, marginal anything on single phase is not really good enough because as the volts go down the current rises and doesnt do anything much good, my mate had the same problem trying to get his new 8kw compressor to start, the static converter was singing and dancing and not happy, to start it, crazy as it may seem I had the idea to start and run the lathe, (which btw would previously brown out the lights on its own!) we started it before the compressor and left it spinning the big the 4jaw chuck , because that then kind of turned his system into a rotary system, but the main thing was it create a flywheel effect ie a store of electricity and the compressor would fire up ok, we ran a new main cable in because it was 4mm before to 16mm or maybe 25 cant remember now, and the motor will now start on its own no issues, without putting the lights out.
WorkshopChris
Member
- Messages
- 5,049
- Location
- South East Essex
It does sound that way, if you go for a converter you will probably need a supply upgrade.
Yeah tbh I forgot about an issue we used to have with the table saw killing the lights, so you'd be standing in the dark with the table saw running waiting for the lights to reset! Cant remember what was done to remedy that but obv wasn't to upgrade the cable
normspanners
Member
- Messages
- 8,853
There is your answer 
sounds just like my mates place, to make sure we ran a temporary extra 4mm flex cable in overground , joined it with the original and it made the job 70% better, with the two cables, so he got the bigger cable the converter doesnt hum, the lathe starts and the lights hardly change.
Last edited:
