Template · Service and panels

Hot tub with GFCI disconnect single line diagram

A 50A circuit to a spa disconnect within sight of the tub. Use this for an outdoor hot tub on a 240V circuit: a breaker in the main panel, a GFCI spa disconnect within sight of the tub, and flexible conduit to the tub.

A free template with typical ratings, conductor callouts and general notes. Open it, change what differs on your job, fill in the title block and export a PDF.

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Hot tub with GFCI disconnect single line diagram: A 50A circuit to a spa disconnect within sight of the tub. — Hot tub with GFCI disconnect. 10 devices on an 11 × 17 in sheet with a title block and notes column.

What the reviewer checks on this drawing

The inspector checks the ground-fault protection, the disconnect within sight of the tub and at least 5 ft from the water (in Canada, the GFCI at least 3 m away), the insulated equipment grounding conductor, and the bonding at the tub, which in Canada can mean a bonded ring round it.

What the drawing shows

Every device on the sheet, in the order power reaches it.

Symbol	Label	Rating or detail	Conductors feeding it
Utility source	Utility service	120/240V 1φ 3W
Meter	Utility meter	200A socket	Service conductors, per utility
Circuit breaker	200A 2P	Main breaker
Panel	Main panel	200A bus · 120/240V
Circuit breaker	Branch breakers
To (continues off sheet)	To house loads
Circuit breaker	50A 2P	Hot tub
Panel	Spa disconnect	60A · NEMA 3R	3 #6 Cu + #10 G, 1" PVC
Circuit breaker	50A 2P	GFCI
Device	Hot tub (SPA)	240V · 40A nameplate, self-contained, listed	3 #6 Cu + #10 G, liquidtight flex, 6 ft max

Notes on the sheet

Hot tub nameplate 40A: 40A × 125% = 50A circuit on #6 Cu. Replace with the nameplate data of the tub installed.
Ground-fault protection for the tub (NEC 680.44; CEC Section 68), provided here by the GFCI breaker in the spa disconnect.
Spa disconnect within sight of the tub and at least 5 ft from its inside wall (NEC 680.13). In Canada the GFCI is kept at least 3 m from the tub (CEC Rule 68-068): put the spa disconnect 3 m or more away.
Insulated copper equipment grounding conductor run with the circuit conductors, all the way to the tub. Flexible conduit at the tub no longer than 6 ft (NEC 680.42(A)).
Bonding at the tub per NEC 680.26 as changed by 680.42 for a listed self-contained spa. Follow the installation instructions. In Canada a listed tub is not exempt: CEC Rule 68-058 can ask for bonded reinforcement or a No. 6 copper ring round a permanently installed tub, depending on what it sits on.
Service load calculation to confirm capacity for the added load.

Diagram is schematic and not to scale. Field-verify existing equipment ratings. Ratings and conductor sizes shown are typical. Confirm against the adopted code, the equipment listing and a load calculation before installation. Code references are to the 2023 NEC and the 2024 Canadian Electrical Code: see references and editions.