Electrical Design 1

To find a Design Current (Ib) you do what?

• Power(W)/Volts(V)

• Voltage(V)/Power(W)

• Power(P)/Current(I)

• Voltage(V)xCurrent(I)

The Correction Factor for Ambient Temperature is...

• Cf

• Cd

• Ci

• Ca

The correction factor of 0.725 applies to which form of circuit protection?

• BSEN60898

• BS88

• BS3036

• BSEN61008

The Max Zs Values for BSEN60898 are found on what page in the On Site Guide (3rd Amendment 2022)?

• P.145

• P.131

• P.3

• P.125

Table I1 in the On Site Guide details what?

• Max. Zs Values

• Circuit Design

• Resistance/meter for Copper and Aluminium Conductors

• Volt Drop in Copper Conductors - mV/A/m

What does the term 'Design Current (Ib)' refer to?

• The current that a circuit is designed to carry under normal conditions

• The maximum current that a circuit can carry

• The minimum current that a circuit can carry

• The current at which a circuit breaker will trip

What is the purpose of the Correction Factor for Ambient Temperature?

• To adjust the current carrying capacity of a cable based on the ambient temperature

• To adjust the voltage drop in a cable based on the ambient temperature

• To adjust the resistance of a cable based on the ambient temperature

• To adjust the power factor of a circuit based on the ambient temperature

What does the term 'Prospective Fault Current (Ipf)' refer to?

• The current that a circuit is designed to carry under fault conditions

• The maximum current that a circuit can carry

• The minimum current that a circuit can carry

• The current at which a circuit breaker will trip

An Adiabatic Equation can help size which conductor?

• The Line

• The CPC

• The Neutral

• L2

The term Cd relates to...

• Correction Factor for diameter

• Correction Factor for Ambient Temperature

• Correction Factor for Thermal Insulation

• Correction Factor for Buried Cables