In this blog post, I will cover the hot tub wiring. Specifically, I am talking about how we can connect the various components to the Spa Pack. If you are looking for information on the Hot Tub Electric Requirements, then I have separate blog post on that.

The Spa Pack is the Central Control

The Spa Pack is the central control unit of your Hot Tub. It is the Spa Pack that controls the temperature. It is also the Spa Pack that controls your pumps and your blower. Whilst the spa packs may look different depending on the manufacturer, their role is the same; control all the electrical parts in your Hot Tub.

In its most basic form, a Spa Pack is a set of fancy relays; the control hub of your hot tub wiring. When you want to turn on your heat, a relay connects and sends power to the heating element. When you want to turn on your jets, a relay connects and sends power to your pump.

Why is this important? In short, it is your Spa Pack that is distributing the electricity to the various pumps and blowers that you have connected. Therefore, the first thing to note is that your Spa Pack should be connected to your mains supply directly. This is normally through 8-10mm2 cables as you will invariably be supplying the pack with 40+ Amps of current.

Hot Tub Wiring – The Electrical Block

Depending on the pack that you have, the main electrical block will look a little different. Below are two examples. The one of the left is my favourite pack from the USA from manufacturer ACC and on the right, there is an example from Balboa. Please note, if you are in the USA, then you will be using your split system to power the Spa Pack with 230V – 110V is not going to work for you if you have build a tub from brick or concrete, invariably they will be too large and too much water volume for 1.4KW of heat which is the maximum you can get on a 110V supply.

Hot Tub Cables
Hot Tub Cables

Connecting the Pump

Some pumps come with a cable already attached, others, will not. Again, depends on the brands that you have selected or have been supplied. There are two types of pump regardless of size for hot tubs. Circulation pumps and Jet Pumps.

Circulation Pump Vs Jet Pumps

A circulation pump is designed to move the water through the heater and the filter at low speed drawing low amounts of current from the electrical supply. The circulation pumps tend to be single speed and smaller and quieter than jet pumps.

Jet Pumps can either be single or dual speed but they are much larger and send more volume of water through the jets a lot quicker.

Single Speed Pumps Vs Dual Speed Pumps

For this article, we are concerned with how we are going to connect everything together. Therefore, what is important for us to know is that a single speed pump will have a 3 core cable whereas as dual speed pump will have a 4 core cable.

This is important to know because when you are plugging in your pump to the pack, you need to know which pins are for which connectors. If for example, you get the high and the low speed the wrong way around, you are going to have problems.

Example of a 3 Pin Connector (single speed pump)

3 Core Hot Tub Cable

Example of a 4 Pin Connector (dual speed pump)

4 Core Hot Tub Cable

What are the different colours on a Hot tub Pump Cable?

Hot tub pump cables as we have mentioned, have either 3 or 4 cores depending on whether they are single or dual speed. There is in fact a colour code system for the cables. Just to make things a little different, the colour codes are different if you are located in the USA or In Europe.

Below you can see the colour codes for the Hot Tub pump cable from each of the different regions.

USA Spec Cable

USA Hot Tub Cable Specification

European Spec Cable

Euro/UK Hot Tub Cable Specification

What about the pin out diagrams for the Spa Pack?

Depending on the brand of Spa pack, you will need to check the pin out diagrams with the manufacturer. In the USA, I like to use the ACC Spa Pack and you can see the pin out diagram below. This will show which is high speed and which is a low speed. In Europe and the rest of the World, I like to use the Balboa or Vian power (Balboa OEM) and you can see the pin out diagrams below.

ACC Pin Out Diagram

Hot Tub Wiring Explained

Balboa Pin Out Diagram

Hot Tub Wiring Explained

Connecting Accessories like a Blower.

Typically, accessories like a blower will connect using a 3 core cable. They will use just one of the output voltages and this does differ from Spa Pack to Spa Pack. For example, you can see above on the ACC pack that the pin out combinations are totally different for an Air blower than on a pump. For a Balboa pack, they generally use the Line voltage plus the neutral and the ground. You should definitely check the wiring diagram of the specific pack that you have purchased if you are not sure. The good thing is that with an accessory, you are unlikely to damage it if you get the pin out wrong. It will just not work.

Hot Tub Wiring – Configuring a Balboa Spa Pack

If you are using a basic setup, and by basic I mean a regular dual speed hot tub pump with a single speed blower, out of the box, your Balboa pack is likely to work without any additional configuration.

On the underside of the Spa Pack covers, you will see a circuit diagram that looks something like this.

Firstly, you need to work through the setup table at the bottom on the left hand side and work out which setup number you need. For example, a 2 speed pump and a single speed blower will need setup #12.

Next, you need to change the DIP switch settings to match your setup. Once you have the right combination of DIP switches, using the topside control you should do the following to change the pack’s setup mode to #12.

To go into the low levels follow the following steps please.

  1. Turn tub off.
  2. DIP switch 1 move to ON.
  3. Turn tub on
  4. On the top side control, Press “WARM” twice
  5. Press “LIGHT”
  6. Press “WARM”
  7. Then use “WARM” to move down to the low levels until you get on the set up number you need.
  8. Turn off tub
  9. DIP switch one back to OFF
  10. Turn on tub

Getting the right setup and config is important for the pack to function correctly and the buttons on the top side to do what you expect them to.

Hot Tub Wiring – Configuring an ACC Spa Pack

These instructions on wiring and installation are provided as a guideline to assist you. Some experience of electrical wiring and do-it-yourself is required to install the light. If at any time you are unsure of how to proceed, you must consult a qualified electrician.

Voltage

The parts supplied by www.buildahottub.com are designed around a 4-wire 240V system. We do not supply parts in our configurations for 110V systems as they tend to be underpowered.

Therefore, you need to make sure you configure your system for 240V.

The system is 240V, 41A @ 60HZ

Please use #6 AWG Copper Conductors

Connecting Power

Neutral in the middle.

Line 1 to the left.

Line 2 to the right.

Should look something like this when connected.

As we are using 240V you also need to move two cables over. The Blue Cable (which is the pump) and the Red & White Stripe Cable (which is the blower) need to move from the neutral connector, over to the Line 2 as shown in the photograph below. (Solid White cable stays where it is)

When you have moved the cables, it should look something like this.

Pump Wiring

The pump cables that are supplied with the ACC Smart Touch have the following colours.

Black Wire is the High Speed.

Red Wire is the Low Speed

Green goes to Green on the Pump

White goes to White on the Pump

Pin Diagrams

Generally, the systems supplied by www.buildahottub.com involve dual speed pumps and a blower.

The blower will plug into “Air Blower” and the pump will plug into “Primary Pump”

Depending on the model of pump supplied, you will need to check the wiring diagram to see which is high and which is low speed terminals.

Do not connect the Pool Light supplied by www.buildahottub.com to the control unit. It is not compatible.