What must be bonded together when installed for hydromassage bathtubs?

When installing hydromassage bathtubs, it is essential to bond together all exposed metal surfaces within a 5-foot radius of the tub. This requirement is in place to ensure safety and to reduce the risk of electric shock. Bonding these surfaces creates a low-resistance path for electricity, which helps to prevent any hazardous voltage from appearing on metal surfaces that users may come into contact with while using the bathtub.

The need for bonding within this proximity is particularly critical because hydromassage systems often involve the use of water and electrical components, which can create a dangerous situation if there is a fault in the electrical system. By bonding the exposed metal surfaces, any potential fault current will be directed away from the user, enhancing overall safety.

While other elements mentioned, such as all plumbing systems and all noncurrent-carrying metal parts, do play a role in electrical installations and safety, the specific requirement for bonding within 5 feet focuses on reducing risks directly related to the operation of hydromassage bathtubs and the immediate environment around them. Therefore, focusing on the immediate surrounding area and ensuring that all exposed metal surfaces are bonded together is critical in ensuring user safety around these installations.