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Wire & Cable ASIA – September/October 2007

105

www.read-wca.com

13

2.1.4 Electrical Fire Safety

(27)

Report issued by

the US Fire Safety Administration

The Problem

: During a typical year, home electrical

problems account for 26,100 fires and more than

$2 billion in property losses. About half of all

residential electrical fires involve electrical wiring.

Statistically, December and January are the most

dangerous months for electrical fires.

Fire deaths are highest in winter months with more

indoor activities, and increases in lighting, heating,

and appliance use. The bedroom is the leading

area of fire origin for residential building electrical

fires. However, electrical fires that begin in the living

room/family room/den areas result in the most

deaths.

The Causes of Electrical Fires

: Most electrical

distribution fires result from problems with “fixed

wiring” such as faulty electrical outlets and old

wiring. Problems with cords (such as extension and

appliance cords), plugs, receptacles, and switches

also cause many home electrical fires.

Light fixtures and lamps/light bulbs are also

leading causes of electrical fires. Many avoidable

electrical fires can be traced to misuse of electric

cords. These include overloaded circuits, poor

maintenance, and running the cords under rugs or in

high traffic areas for example.

2.1.5 Marketing Considerations

Standards are necessary for business success.

Having people who are standards experts in

your organisation is essential. Many of our cable

businesses are international. Therefore companies

need standards experts who are intimately familiar

with several national standards.

New materials must meet the same performance

criteria of developed materials, and receive temperature

ratings based upon standards performance protocols such

as relative thermal index. The issued standard creates

a level performance playing field for manufacturers.

This enables companies to act by investing in product

development resources

(28)

.

3 Standards Development Organizations

(SDO)

• ASTM International develops both Standard Test

Methods and Product Standards

• UL and CSA related to the respective country National

Electric Code in the US and Canada

• Insulated Conductor Engineers Association

• ISO and IEC, discussed previously

• Other international organisations include GB/T (China),

NOM (Mexico), and BS (Great Britain)

ASTM International is a globally recognised leader in

the development and delivery of international voluntary

consensus standards

(29)

. Today, some 12,000 ASTM

standards are used around the world to improve product

quality, enhance safety, facilitate market access and trade,

and build consumer confidence.

Test

Type Test

Test Comment

D1929

(17)

Ignition Temperature

Measures ignition

temperature of plastics

D2863

(18)

Oxygen Index

Percent of oxygen

needed to sustain flame

D3801

(19)

Extinguishing

Vertical flame,

extinguishing

characteristics

D3874

(20)

Ignition

Ignition of material by

hot wire sources

D5424

(21)

Smoke

Vertical cable tray

smoke measurement

D5485

(22)

Corrosion

Cone calorimeter

corrosion test

D5537

(23)

Fire Load

Heat release, flame

spread, mass loss

E 662

(24)

Smoke Spread

Amount of smoke

UL 1685

(25)

Cable Vertical Tray Vertical tray fire spread,

smoke release

UL 2196

(26)

Fire Resistive Cable Tests for fire resistive

cable, (fire stop)

Table 1

:

Standards examples of ASTM and UL wire and cable fire and

smoke tests

(7)

ASTM’s leadership in international standards develop-

ment is driven by the contributions of its members, who

include more than 30,000 of the world’s top technical

experts and business professionals representing 135

countries.

Working in an open and transparent process and using

ASTM’s advanced electronic infrastructure, ASTM

members deliver the test methods, specifications, guides,

and practices that support industries and products

worldwide. UL and Canadian Standards Association (CSA)

undertake development of safety standards

(7)

in the United

States and Canada, respectively.

These two organisations make a significant contribution to

the national electrical code of their country. In the United

States, the National Fire Protection Association (NFPA)

issues the National Electric Code. Materials suppliers and

cable manufacturers can propose changes to the UL and

CSA standards and subsequently obtain changes in the

national electrical code.

This occurs after demonstrating that new materials

or cables product meet rigorous and demanding

performance capability. For North America, UL and CSA

have a significant stake in assuring the safety of products

that provide expected performance.