I am installing a Jacuzzi tub in my basement , no heater , What size circuit breaker , and what number wire should i use .

There are several things that can cause this problem. The first is you just have a bad breaker, next is your heater unit is bad, lastly the pump motor could be bad. There is also the possibility that the motherboard is bad again.

Sounds like the heating element has gone out again. Once you reset the circuit breaker and the tub turns on it will start to circulate the water. This usually runs like this for about 2 mins and then the tub will recognize it is cold and send power to the heater. If the element is back at that point it will blow the circuit breaker.
If this circuit breaker pops as soon as you turn it on then you most likely have a bad circuit board.

Rod
www.uspartscenter.com

If you have something burnt on your circuit board you will need a new circuit board.
begin with finding the chip number on the circuit board. this chip is usually located close to the transformer on the circuit board.


Rod
US Parts Center
888-521-6183

What is the amp rating for the tub? What voltage are you actually running the tub on, 120 or 240? Is the 120v 10amp two-pole then the switch rating since you mention a switch? If there is no amp rating on the control what is the wattage of the heater element and how much horsepower is the pump rated for?

In the end it seems likely you do not have high enough breaker ratings to carry the pump(s) and the heater at the same time. Depending on the electrical circuit wire size and the breakers and switches you may need to make some adjustments or replace some of the components but I'll/we'll need more details on your existing setup and the tubs electrical demand to help you further.

John

if the light on the heater is not coming on when the tub is full of water and the pump is on then the heater is not working.
check the circuit breaker to make sure it is on.
the heater and the pump cannot be on the same circuit. They have to be on separate circuits.
Make sure they are on separate circuits.
Check to make sure you have the heater installed in the correct place.
there is a pressure heater that mounts anywhere after the discharge of the pump.
there is a vacuum heater that mounts in front of the pump in the suction line.
if you put on or the other in the wrong place it will never come on.

First thing to consider is size of Load.
Leviton countdown-timer Load rating is 1800 Watt, 120Volt.
Look inside Jacuzzi at rating plate on motor.
Rating plate on motor should give Volts, Watts and Amps.
Formula Volts x Amps = Watts.
Sometimes motor shows VA which is Watts
Is Jacuzzi on 240Volt breaker or 120V breaker?
Leviton countdown timer is not for 240V load.

A) If 120Volt electric Load checks out, here's how to wire timer if 1 cable enter box.
Timer-black-wire connects to jacuzzi-black
Timer-white-wire connects to ground.
Timer-green connects to ground.
Timer-red connects to jacuzzi-blue.

B) Here's how to wire timer if 2 cables enter box.
120Volt cable coming from breaker box has black, white and bare copper wire.
Timer-black-wire connects to black-wire-from-breaker
Timer-white-wire connects to white-wire-from-breaker-box.
Timer-green and jacuzzi-ground connect to ground

Timer-red-wire connects to jacuzzi-black-wire.

Jacuzzi-blue-wire connects to white.
I am puzzled why this wire is blue if circuit is 120Volt.

Your Jacuzzi should be connected to a large GFI breaker. If it pops as soon as you turn something on, there is an imbalance between the legs supplying the power to your device. When my (small "J") jacuzzi (at about age 15) did this, I discovered a small leak that had dripped onto the circuit board and had left a deposit causing a "short". I was able to clean the deposit off of the board physically, I fixed the leak and return my tub to service.

The GFI is very sensitive and for good reason. It protects you from dangerous electric voltages, even though the danger is low.

get an electrician. you need to follow the code for the size of wire to use based on number of amps of the motor and how far away the pump is from the power outlet.

Breaker, even GFI's are designed to trip at 135% to 600% over there load rate, so not to scare you but it depends more on the wire used from the main panel to the dryer/hot tube then the breaker. A GFI's claim to fame is the speed at which it will trip if voltage is detected on the ground side of the breaker. So to answer a question with a question, Can you overload a GFI without tripping it, Yes you can, just be careful the life of your hot tube motor and heater could be in danger if you overload the circuit.

The light is supposed to be on when the tub is full of water and the pump comes on. Make sure the heater is plugged into a seperate breaker, it cannot be on the same line as the pump.
Look on the heater for a label. If your heater is installed on the discharge side of the pump it should say "pressure heater" on it. If it is installed in front of the pump it should say "Vacuum Heater" on it.
Once installed, fill the tub with water and turn the pump on. If it is installed in the correct position the light will come on when the pump turns on.