Hot Tub Circuit | Spa Disconnect





 



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SPA DISCONNECT





• Hot Tub Disconnect

Before installing a major appliance like a hot tub, determine if the electric service will handle the extra load. It's usually not a problem, since most homes built in the last 30-40 years have at least a 100 amp service, with 150-200A common in newer homes. Panel ratings are normally labeled near the main breaker at the top.

A 240V spa must be supplied by a circuit which meets its load requirements (amperage) as indicated in owner's manual. This means that the feeder breaker (in the house service panel) must be of the specified size, and that the GFCI breaker in the disconnect panel must be at least that size (larger is fine) and is GFCI protected for safety.

A large portion of 240V spas manufactured today require a 50 amp 4-wire electrical service. Some hot tubs have load requirements of 30A or 40A, and a few even 60A, which should correspond to the size of the new feed circuit breaker installed in the house service panel. The Disconnect GFCI panel's amp rating can be equal to, or larger than the feed breaker in the main panel. Hot tubs with mixed voltage components (such as 120V ozonator and 240V heater) require 4-wire systems, which means they require an electrical circuit providing (2) hot wires, (1) neutral, and (1) ground wire. Some 240V spas (and many older ones) use three wire systems with (2) hot wires and (1) ground wire, without a neutral wire. Both 3-wire and 4-wire spas must be GFCI protected. A 4-wire hot tub must not be connected to a 3-wire service. Proper grounding is also essential. In either case, the disconnect panel must be supplied with a 4-wire service in order for the GFCI to function as required.

All Hot Tubs / Spas must have an emergency shutoff at least 5í but not more that 50í from the waterís edge, readily accessible, and within sight of the Hot Tub / Spa.

In electrical engineering, a disconnect or, disconnect switch or isolator switch, is used to ensure that an electrical circuit is completely de-energized for service or maintenance. Such switches are often found in electrical distribution and industrial applications, where machinery must have its source of driving power removed for adjustment or repair. High-voltage isolation switches are used in electrical substations to allow isolation of apparatus such as circuit breakers, transformers, and transmission lines, for maintenance. The disconnect is usually not intended for normal control of the circuit, but only for safety isolation. Disconnect can be operated either manually or automatically (motorized disconnect).

Because of the nature of AC Disconnects, and other Electrical issues, it's best to leave this to the pros at SafeSide Electrical Contractor,

Disconnect for medium voltage
Unlike load break switches and circuit breakers, disconnect lack a mechanism for suppression of electric arc, which occurs when conductors carrying high currents are electrically interrupted. Thus, they are off-load devices, intended to be opened only after current has been interrupted by some other control device. Safety regulations of the utility must prevent any attempt to open the disconnect while it supplies a circuit. Standards in some countries for safety may require either local motor isolators or lockable overloads (which can be padlocked).

Disconnect have provisions for a padlock so that inadvertent operation is not possible (lockout-tagout). In high-voltage or complex systems, these padlocks may be part of a trapped-key interlock system to ensure proper sequence of operation. In some designs, the isolator switch has the additional ability to earth the isolated circuit thereby providing additional safety. Such an arrangement would apply to circuits which inter-connect power distribution systems where both ends of the circuit need to be isolated.





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