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Thank Shane
Hi @Cath74 ,
Welcome to the community!
You can leave the NBN on even if with storm but we recommend connect it with Electric Surge Protector for the safety of the device.
Let us know should you require further assistance.
Regards,
Thank Shane
You're welcome! In case you'll have queries in the future do not hesitate to create a new thread here in our community, cheers!
Thank Shane