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C&G Unit 2392-101/102 > Regulations > Flashcards

Regulations Flashcards

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1
Q

The regulations state…

The voltage drop of a power circuit must not exceed…what?

A

5% of the nominal voltage.
In practical terms (230V), a volt drop of more than 11.5V would be against regs.

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2
Q

The regulations state…

The voltage drop of a lighting circuit must not exceed…what?

A

3% of the nominal voltage.
In pracitcal terms (230V), a volt drop of more than 6.9V would be against regs.

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3
Q

According to regulations…

What is Zone 0?

A

Inside a bath or shower tray.

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4
Q

According to regulations…

What is Zone 2?

A

Zone 2 is anywhere within 0.6m of Zone 1/ 0. Ie. within arms reach.

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5
Q

According to the regulations…

What is Zone 1?

A

The area of space directly above Zone 0.

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6
Q

According to the regulations…

How tall are each of the zones in a bathroom?

A

2.25m tall.

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7
Q

What are the two voltages that make up Band 1?

A

< 50V AC
< 120V DC

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8
Q

What are the two voltages that make up Band 2?

A

51 - 1000V AC
121 - 1500V DC

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9
Q

What is the maximum trip time allowed for a circuit using a BS61008 RCD, when half of the design current is applied to it?

A

It should not trip

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10
Q

What is the maximum trip time allowed for a circuit using a BS61008 RCD, when 100% of the design current is applied to it?

A

300ms

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11
Q

What is the maximum trip time allowed for a circuit using a BS61008 RCD, when 500% of the design current is applied to it?

A

40ms

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12
Q

What is the name of the statutory regulations which set out specific safety standards that are aimed at protecting the public & consumers from the dangers of electricity?

A

Electricity Safety, Quality and Continuity Regulations 2002

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13
Q

True or false:
The BS7671 applies to all electrical work.

A

False.
The BS7671 only applies to installations whose operating voltage is up to 1000V.

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14
Q

What are the seven steps in safe isolation?

A
  1. Identify the sources of supply
  2. Isolate the supply
  3. Secure the isolation
  4. Test the voltage indicator
  5. Test system dead
  6. Retest voltage indicator
  7. Begin work
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15
Q

True or false:
The key used to secure an isolation must be unique to that particular locking device.

A

True.
This is to ensure that nobody can inadvertantly turn the supply back on.

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16
Q

What were the old colours for single phase installations pre April 1st 2004?

A

Live - Red
Neutral - Black
Earth - Green

17
Q

What were the old colours for three phase installations pre April 1st 2004?

A

Live 1 - Red
Live 2 - Yellow
Live 3 - Blue
Neutral - Black
Earth - Green

C&G Unit 2392-101/102 (12 decks)

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