JelleM

Thank you for your reply. To start with, I'm designing this project, commissioned by a company. This means, if this design gets through, people with the right competences will be working on these electric circuits (not me). The purpose of the 230V circuitry is to power electric motors via a motor controller (frequency drive). For our design, AC motors seem to be better. Double isolation is indeed an option, but frequency drives don't work well without earthing because the earthing act as a filter. Do you suggest to change our design and use DC motors instead?

Hello My name is Jelle. I'm a belgian 3rd year bachelor student working on a schoolproject. The project consists of a modification of a truck. This modification contains electrical components at 230V AC. The problem is, these electrical components need proper earthing to prevent danger. Normally an earthing is provided but this is quite difficult in a truck because there's no connection with the earth. I know it's possible to use the chassis as a GROUND, but that's just a zero reference voltage so it's not the same as an Earthing connection. My question is: how do I ensure the safety when using 230VAC components that need earthing which is not (or is it?) possible on a moveable vehicle. Thank you in advance Sincerely