Permitted voltage systems
Information on voltage systems | Information on permissibility |
|---|---|
DC voltage grids | Maximum voltage to ground = 546 V |
DC voltage networks with grounded positive or negative terminal | Use is not permitted. |
TN and TT systems – voltage systems with directly grounded star point | TN: Use is possible without restrictions. TT: Use for UL-certified equipment not permitted |
IT systems – voltage systems with non-grounded star point | Use is only permitted adhering to specific measures. For measures, refer to chapter Use in IT systems |
Voltage systems with grounded outer conductor | Use is not permitted. |
