The diary of an inventor: Wayne Draper talks all things R1 R2 Link | Super Rod

The diary of an inventor: Wayne Draper talks all things R1 R2 Link | Super Rod

What is your invention and what is it designed to do?

When continuity testing on radial circuits, the R1 R2 Link (SRR1R2) allows you to link R1+R2 together at the consumer unit without disconnecting any conductors.

What is your background in the electrical industry?

I originally worked for eight years as an Electrical Engineer before taking up a position teaching. I then came back into the industry around five years ago.

What inspired your invention?

I’ve assessed a lot of people on Inspection & Testing qualifications and always felt there had to be a better way of linking R1+R2 without disconnecting the conductors from the board in any way. I also wanted to come up with an idea to reduce the amount of damage on test rigs, and particularly examination boards.

  • SRR1R2 R1 R2 Link - PRIMARY IMAGE (1)
  • SRR1R2 R1 R2 Link - PRIMARY IMAGE (2)

Are there any other scenarios where the R1 R2 Link will prove useful?

I’ve found the product to be an invaluable aid when undertaking EICRs on consumer units, as it helps to make continuity testing less invasive and reduces the risk of causing damage.

Why are the probes shaped like a PZ screwdriver bit?

An R1+R2 test is carried out with a low resistance ohm meter with a high level of accuracy required. It is essential that any equipment doesn’t add any additional resistance to the results as this could lead to an electrician looking for a problem that doesn’t exist. By having the R1 R2 Link in the shape of a PZ screwdriver head it increases the surface area of the probe which significantly reduces the contact resistance and guarantees that no more than 0.01Ω will be added to the reading.

How is the R1 R2 Link different to other magnetic probes and links?

Most magnetic probes have the magnet at the tip of the probe. These aren’t suitable for low resistance testing as testing through the magnet adds a significant amount of additional resistance to the reading. The R1 R2 Link has been designed with the magnet sitting behind the screwdriver bit, so no significant additional resistance is added to the result as the magnet isn’t in series with the circuit under test.

Why are there two different probe types?

The red R1 R2 Link has a PZ2 probe and a short shaft, making it suitable for MCBs and some RCBOs. The yellow R1 R2 Link has a PZ1 probe and longer shaft, making it suitable for RCBOs and AFDDs with deeper recessed terminals.

Are the magnets strong?

The magnets are strong enough to guarantee that a low resistance connection of 0.01Ω or less will be maintained. The tight fit of the screwdriver bit facilitates this and also adds to the strength of the connection.

Why did you work with Super Rod?

Once I met Malcolm, Sam and the team, I knew I could trust them to look after my idea and business interests. There was a great level of engagement from the start and I’ve been involved with every decision in bringing the product to market. This, coupled with its manufacturing base and distribution network, made Super Rod an attractive partner.

Finally, any tips for would-be inventors?

This Linus Paulin quote sums it up nicely: “If you want to have a great idea, have lots of ideas”.

Do you have a clever idea for the next ‘must have’ tool? Contact

For more information on the Super Rod R1 R2 Link tool (SRR1R2) , click here

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