If you’re planning a backyard project this year, Ottawa pool electrical rules have changed — and that affects more than just wiring.

This isn’t ESA “being picky.” These updates are about stray/contact voltage and preventing shock hazards around water (aka the one place you really don’t want “mystery electricity”).

The timing (so you don’t get caught mid-project)

• The 2024 Ontario Electrical Safety Code took effect May 1, 2025.
• ESA allowed a transition window for pool bonding, but that ended:
  Any notification of work filed on or after October 1, 2025 must meet the revised pool/hot tub bonding rules (Rule 68-058 in the 2024 OESC).

If you’re building in 2026, assume the new rules apply. Because they do.

Ottawa Pool Electrical Rules: What Changed?

The big shift is equipotential bonding — making sure the water, the deck, and nearby conductive stuff are all tied together so you don’t become the “path” when something faults.

The headline changes:

1) Pool water bonding is now a real requirement (not a “maybe”)

If your pool is nonconductive (vinyl liner / some fiberglass scenarios) and there aren’t other bonded conductive parts contacting the water, the code now requires bonding the water itself using a corrosion-resistant conductive surface with at least 58 cm² exposed to the water.

That usually means a listed “water bond” fitting/device tied into the bonding system.

2) The deck/perimeter bonding got stricter (and sometimes means a copper grid)

Depending on your pool type and how the deck is built, you may need a copper grid (minimum No. 6 AWG bare copper) under/around the perimeter surface to keep everything at the same electrical potential.

Translation: the electrical plan can affect the concrete/pavers plan now. This is why we want in early.

3) Hot tubs/spas can now require a copper ring around them (yes, really)

For permanently installed spas/hot tubs, if the surface around it doesn’t meet the reinforced concrete bonding method, ESA guidance allows/points to a bare No. 6 AWG copper ring installed:

• 450 mm to 600 mm around the tub
• 100 mm to 150 mm below grade
• connected to the tub’s bonding lug

And importantly: if you build a nonconductive perimeter surface (like a properly done composite/wood deck) that extends 1 m beyond the outer contour, the ring may not be required.

So yes: material choices matter now.

“Okay, but what about outlets, equipment, and GFCI?”

Still a huge deal — and ESA’s bulletins are pretty blunt about it.

Anything electrical within 3 m of the pool? Expect Class A GFCI protection

ESA guidance states that electrical equipment located within 3 m of the inside walls of the pool must be GFCI protected unless it’s suitably separated by a fence/wall/permanent barrier that prevents simultaneous contact with equipment and pool water.

This can affect:

• pool pumps
• pool lighting transformers
• A/C units
• meters
• other outdoor electrical equipment near the water

Receptacle placement: don’t “just add a plug”

ESA guidance notes:

• a receptacle generally can’t be closer than 1.5 m to the pool/hot tub (measured using a “string” method to simulate a cord).
• GFCI devices (receptacle/deadfront/breaker) are not permitted closer than 3 m unless guarded as allowed by the rules/guidance.

So if someone says “we’ll just slap an outlet right beside the tub,” that’s a no.

What homeowners should do before the digging starts

This is the part that saves money.

1) Decide your layout first (pool/tub + equipment + deck materials)

Because now:

• deck type can trigger copper grid requirements
• hot tub base/perimeter can trigger copper ring requirements
• equipment distances can trigger GFCI changes

2) Don’t let the pool/hot tub contractor “handle the electrical”

They’re great at pools. They’re not the ones answering ESA inspection questions. Electrical should be designed and installed by a licensed electrical contractor, with ESA notification/inspection done properly.

3) Ask your electrician one simple question:

“What bonding method are we using for the shell, the deck, and the water — and what does that mean for my concrete/pavers?”

If you can’t get a clear answer, hit pause.

Common ways people accidentally fail inspection

• Hot tub set on pavers/ground with no plan for the bonding ring (and then landscaping is already finished).
• Vinyl/fiberglass pool water not bonded correctly (because “the water is water”… yeah, it’s also conductive).
• Pump/A/C/equipment too close to the pool without proper Class A GFCI protection or proper barrier separation.
• Receptacles planned too close because someone wanted “convenience power.”

Bottom line

The new rules are not “extra.” They’re the new normal — and they affect planning, not just wiring.

If you’re in the Ottawa area and you’re planning a pool or hot tub install, get the electrical piece designed early so the bonding, deck, and equipment layout all work together (and you don’t pay twice).

Want it done once, clean, and ESA-ready? Book a site visit and we’ll map the layout, bonding approach, and electrical scope before your yard turns into a construction zone.