Planning Preparations
DC Disconnects and Over-Current Devices
The DC circuit from the battery to the inverter/charger must be equipped with a disconnect and overcurrent protection device. In Australia, disconnect and overcurrent protection devices must be approved for use in Australia. Refer to your applicable installation code for guidance.
Type This device usually consists of a circuit breaker, a “fused- disconnect”, or a separate fuse and DC disconnect. Do not confuse AC circuit breakers with DC circuit breakers. They are not interchangeable. Rating The rating of the fuse or breaker must be matched to the size of cables used in accordance with the applicable installation codes. Location The breaker or fuse and disconnect should be located as close as possible to the battery in the positive cable. Applicable codes may limit how far the protection can be from the battery.
Table 3 Recommended Fuse Sizes
Model |
| Minimum Fuse Size (A) | |
Freedom SW |
| 200 |
|
Freedom SW |
| 250 |
|
Marine Applications1 | A charger needs to be equipped with a | ||
disconnect and an
1.Refer to local electrical codes.
DC Grounding
Recreational Vehicles The inverter/charger DC (chassis) ground terminal needs to be connected to the vehicle chassis by a minimum 8 mm2 copper conductor that is either insulated (green with yellow stripe) wire rated 75 °C or bare copper.
Marine Applications2 The DC grounding conductor may be one size smaller than the minimum size conductor required for the DC current carrying conductors providing the overcurrent protection device in the DC positive conductor is rated no greater than 135% of the ampacity of the DC grounding conductor and the conductor is no smaller than 2 mm2.
2.Refer to local electrical codes.
14 | Freedom SW 230V Installation Guide |