question for sizing a circuit for a in-ground pool heater circuit

[MMEelectric]

Hello I was asked to install the circuit needed for a pool heater. Here is what's on the side of the heater. The run is approx 170' and will be in PVC conduit buried under ground. I want to know what size breaker and copper wire to use. Do I also need to drive a ground rod? This is my first time doing one of these and want to make sure I don't miss anything. Thank you

POOL HEAT PUMP

NOTE: OUTDOOR USE / UTILISATION À L'EXTÉRIEUR

MODEL NUMBER SHAS-137H-UU

RATED VOLTAGE / FREQUENCY 208-230VAC~ 1 PH/60HZ

RATED HEATING CAPACITY 137000Btu/h

TOTAL LOAD / MAX FUSE 30.1A / 70A

FAN MOTOR FLA 2.1 HP 0.41

COMPRESSOR RLA 41.4 LRA 196

MINIMUM CIRCUIT AMPACITY 54A

 

[infinity]

You can use #6 THWN copper with a 70 amp OCPD. Ground rods are not required unless you're installing a feeder and a sub-panel for the pool.

 

[LarryFine]

Welcome to the forum.

Here's what matters:

VOLTAGE / FREQUENCY 208-230VAC~ 1 PH/60HZ

MAX FUSE 70A

MINIMUM CIRCUIT AMPACITY 54A

Just like HVAC equipment, size the wire for 54a (or more), and fuses (not a breaker) of 70a (or less).

As infinity said, a single circuit doesn't need an electrode, but if it's a feeder, the sub-panel would.

 

[MMEelectric]

Rob and Larry Thank you both for the info its greatly appreciated!

 

[Little Bill]

You can use #6 THWN copper with a 70 amp OCPD. Ground rods are not required unless you're installing a feeder and a sub-panel for the pool.

The 70A OCPD would be if the voltage was 230V. If it was 208V, it would be 30A would it not?

 

[infinity]

The 70A OCPD would be if the voltage was 230V. If it was 208V, it would be 30A would it not?

No the MaxOCPD is 70 amps for 208-230 volts.

 

[Little Bill]

No the MaxOCPD is 70 amps for 208-230 volts.

Ok, I thought I saw a slash "/" between the 208 and 230.

 

[LarryFine]

Ok, I thought I saw a slash "/" between the 208 and 230.

Even if so, there would be a much smaller current difference, and the lower voltage would have the higher current.

 

[Little Bill]

Even if so, there would be a much smaller current difference, and the lower voltage would have the higher current.

I noticed that too but didn't check it. I'm recouping from surgery and don't see things clearly. I need to shut the keyboard off and just read!