Electrical Installation Using CMS Components

CMS Electracom manufactures a range of DIY power points and cables that can be soft wired together.

CMS products allow the DIY builder to fit many of the 240V cables and power points into the walls of the Motorhome or Caravan during construction, and therefore limit the onsite time of a qualified electrician to the final inspection and testing.

J-Series vs C-Series

CMS is available in 2 different systems - J-series which is used by Jayco and C-series which is available to other manufacturers (including Enerdrive)

The two series use a different style connection so components can not be interchanged between the two systems (unless using an adaptor).

If replacing parts in an existing system you will need to stick to the same series but if you are starting from scratch you could choose to use either J or C series.

How to Identify J-Series and C-Series

Each CMS component will have either J3 or C3 codes stamped on them. If you are unable to find this you can also identify visually.

The J-series have a larger plug/socket than the C-series as shown in the image below. The interconnecting cables are also an easy way to differentiate between the series. J-Series cables are beige while C-series are white.

How it works

A standard set-up would include the CMS power inlet that accepts 240V power into your RV via a 15amp extension lead.

A CMS circuit breaker has a loom that connects to the power inlet then off to the first power point.

A second cable then also connects to the rear of the first power point and heads off to the next power point. This continues around the RV.

You can also place a double adapter into the rear of a power point (extra recess space required) or at the junction of two cables. From here you can branch a new line off the original. This is ideal if you need a low and high power point on one wall, or you wish to start a new line on the other side of the RV.

The last power point in a line uses the inlet only and the outlet stays available for future use. You can also end the circuit with an external outlet for use outside under your awning.

All power points include double pole switches to comply with Recreational Vehicle requirements.

Lights and light switches are now almost always installed as 12V and can be installed safely by most DIY builders so are not included in the CMS range.

All CMS components we sell comply to Australian and NZ standards for installation in Recreational vehicles. AS/NZ 3112, AS/NZ 61535.1 Int):2001 AS/NZ 3000:2000, 250V 50HZ 20amp. A maximum of 10 double or 12 single points can be included in a single circuit.

As mentioned above a 15amp circuit breaker or 15amp RCD must be included in each electrical circuit. These components are now used by a number of Australia RV manufacturers due to their ease of use.

In designing your cable requirements and installation be mindful that each cable has sealed ends that measures 25mm x 16mm. So if it cannot be installed before sheeting it must be able to be fitted through frame members. All cables have a female and male end to prevent errors in connecting the cables.

All fittings have a security clip so once connected they require manual manipulation to separate. Each power point requires a recess depth of 32mm. Mounting blocks are available where the power point cannot be recessed as described. The cables have an outer sheath and when placed within walls should allow extra length for removal of the power point in case replacement is required.

These products are very good quality. For the full range of both J and C Series please see below:

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