Table of Contents

## What is maximum r1 r2?

Therefore the max expected R1 + R2 value would be 0.73 + 1.20 / 4 = 0.48 Ohms.

## What is the resistance of 1.5 mm cable?

Table 5.5 – Resistance per metre of copper conductors at 20°C for calculation of R1 + R2 | |
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Conductor cross-sectional area (mm²) | Resistance per metre run (m ohms / m) |

1.0 | 18.1 |

1.5 | 12.10 |

2.5 | 7.41 |

**What is R1 R2 test?**

Continuity of Protective Conductors (R1+R2, R1+Rn) This test highlights any faults in cabling or connections. On a ring circuit, the live and earth are cross-connected at each end of the ring, and the R1+R2 measurement will generally be the same at each point on the ring, unless a fault is present.

### How is R1 RN R2 calculated?

The Ring Circuit Test sequence:

- Within the distribution board, remove the Line, the Neutral and the Earth conductors from its terminals.
- Measure between Line to Line to get the reading for “r1”
- Measure between Neutral to Neutral to get the reading for “rn”
- Measure between Earth and Earth to get the reading for “r2”

### What is R1 R2 electrical testing?

**How is r1 R2 measured?**

#### Should r1 R2 be lower than Zs?

Zs=Ze+(R1+R2) well not in this case. Just not come across such a difference before that Zs has been so much lower than Ze+(R1+R2)….See Also:

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· | Wiring and the regulations |

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#### What is the resistance of R1?

Resistors R1 and R2 have equivalent resistant of 6 ohms when connected in the circuit shown below.

**What is the resistance value of R1?**

Two common resistor schematic symbols. R1 is an American-style 1kΩ resistor, and R2 is an international-style 47kΩ resistor.

## What is R1 and R2 in an electrical test?

R1 = resistance of phase conductor ie Live. R2 = resistance of cpc ie earth. Cheers Paul. Just a minor correction, the Zs of an Electrical Installation is the impedance of the entire system, that is from transformer to socket outlet or final circuit.