ICES-006 — AC Wire Carrier Current Devices (Unintentional Radiators)

Issue 2, June 2009

Spectrum Management and Telecommunications
Interference-Causing Equipment Standard

Preface

Interference-Causing Equipment Standard 006, Issue 2, AC Wire Carrier Current Devices (Unintentional Radiators), replaces ICES-006, Issue 1, dated August 25, 2001.

Listed below are the main changes:

  1. Section 2: The definition of in-house BPL has been added.
  2. Section 4.3: Additional in-situ testing requirements have been added.
  3. Section 5.3.1: Radiated field strength limits (Table 3) have been extended to cover devices operating above 30 MHz.

Issued under the authority of the Minister of Industry Canada

space to insert signature
Marc Dupuis
Director General
Spectrum Engineering Branch


Contents

  1. General
  2. Definitions
  3. Instrumentation
  4. Method of Measurement
  5. Limits
  6. Procedural Requirements
  7. Reference Publications
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AC Wire Carrier Current Devices (Unintentional Radiators)
(PDF, 96 KB, 9 pages)


1. General

1.1 This interference-causing equipment standard sets out limits and method of measurement of radio noise emissions and specifies maximum permissible output voltages from AC wire carrier current devices of a design for which any radiation of radio frequency energy is unintentional.

1.1.1 All AC wire carrier current devices of unintentional radiator type are Category II equipment. Category II equipment comprises devices where a standard has been prescribed but for which equipment certification by Industry Canada is not required. The manufacturer or importer shall nevertheless ensure compliance with all applicable standards.

1.2 Subject to subsections 1.3 and 1.4, sections 3 to 7 apply to every AC wire carrier current device that is manufactured or imported into Canada, except AC wire current devices manufactured or imported solely for export purposes.

1.2.1 A grace period ending October 1, 2009, is provided, during which compliance with either ICES-006, Issue 1, or ICES-006, Issue 2, will be accepted. After October 1, 2009, only compliance with ICES-006, Issue 2, will be accepted.

1.3 Sections 3 to 7 do not apply to AC wire carrier current devices:

  1. used solely for demonstration and exhibition purposes; or
  2. used as prototypes.

1.4 Sections 3 to 7 do not apply to AC wire carrier current devices for which the manufacturer, importer or owner has been granted a special permission by the Minister.

The Minister may grant a special permission where:

  1. the manufacturer, importer or owner has presented a written application giving:
    1. the reasons for the request;
    2. an analysis based on sound engineering principles showing that the carrier current device will not pose a significant risk to radiocommunication;
    3. a guarantee of compliance with all the conditions the Minister may set in the special permission; and
  2. the Minister is satisfied that the carrier current device will not pose a significant risk to radiocommunication.

The special permission is valid only if:

  1. the carrier current device bears a label stating that it is operating under special permission and setting out the conditions of that special permission; and
  2. the carrier current device complies with any conditions set out in the special permission.

The Minister may revoke or amend the special permission granted under Subsection 1.4 at any time without prior notice.

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2. Definitions

The following definitions apply in this standard.

"AC wire carrier current device" means a device that transmits radio frequency signals by conduction over electric power lines, and is used in business and residential buildings.

AC wire carrier current devices are classified as:

(a) Interference-Causing Equipment when both the excitor (transmitter) and the receiver are connected to the AC wire line and any radiation of radio frequency energy is unintentional. This includes in-house broadband over power line (in-house BPL) devices. These are subject to ICES-006.

"In-house BPL" means a carrier current system, operating as an unintentional radiator, which sends radio frequency energy by conduction over electric power lines that are not owned, operated or controlled by an electric service provider. The electric power lines may be underground or inside the walls, floors or ceilings of user premises.

(b) AC wire carrier current devices operating in the AM broadcast band of 535-1705 kHz and intended for AM broadcast receivers. These are subject to Industry Canada technical standards for broadcast apparatus.

(c) AC wire carrier current devices of the intentional radiator type, where the excitor is connected to the AC wire line but the receiver is not (e.g. a magnetic loop is used to pick up the received signal). These are subject to the provisions of RSS-210, Low Power Licence-Exempt Radiocommunication Devices (referenced in Section 7.1(3) of this standard).

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3. Instrumentation

3.1 Line Impedance Stabilization Network

A line impedance stabilization network (LISN) shall be used to measure emissions conducted back into the AC wire network. The specifications of the LISN shall be in accordance with the publication referred to in Section 7.1(1).

3.2 Radio Frequency Receiver

A radio frequency receiver whose specifications are in accordance with the publication referred to in Section 7.1(2) shall be used to measure line conducted emissions.

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4. Method of Measurement

4.1 Conducted Emissions Measurement

For carrier current devices that have fundamental frequencies of 0 to 1705 kHz, the line conducted emissions falling in the frequency range of 535 kHz to 1705 kHz shall be measured across a 50 ohm/50 microhenry line impedance stabilization network (LISN) referred to in Section 3.1 and using the radio frequency receiver referred to in Section 3.2. A description of the method of measurement that is acceptable to Industry Canada is found in the publication referred to in Section 7.1(4).

4.2 Radiated Emissions Measurement (Devices Operating Above 1705 kHz)

Pending the development of a standardized method for measurement of radiated emissions below 30 MHz, the field strength may be measured in its near field (measurement distance less than one wavelength/(2π)). The measured field strength shall be extrapolated to a distance of 30 metres using the formula that the field strength varies as the inverse distance square (40 dB per decade of distance). Measurements at a minimum of two distances on at least one radial to determine the proper extrapolation formula, instead of 40 dB/decade, is also permitted. For more information concerning test facilities and methods, see the publication referred to in Section 7.1(4).

4.3 Additional Measurement for AC Wire Carrier Current Devices

In-situ testing is required for testing of the carrier current system functions. In-situ testing shall be performed with the equipment under test (EUT) installed in a building on an outside wall on the ground floor or first floor. Testing shall be performed on three typical installations. The three installations shall include a combination of buildings with overhead line(s) and underground line(s). Measurements should normally be performed at a separation distance of 10 meters from the building perimeter. If necessary, due to ambient emissions, measurements may be performed at a distance of 3 meters. Distance corrections are to be made in this case. In addition to testing around the building, testing shall be performed at three positions along the overhead line connecting to the building. It is recommended that these measurements be performed starting at a distance of 10 meters down the line from the connection to the building. If necessary, due to ambient emissions, measurements may be performed at a distance of 3 meters. Distance corrections for the overhead line measurements shall be based on the slant range distance. For more information concerning in-situ testing, see Section 8.1 of the ANSI C63.4 standard referred to in section 7.1(5) of this document.Footnote 1

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5. Limits

5.1 Conducted Noise Limits

5.1.1 For carrier current devices that have fundamental frequencies of 0 to 535 kHz, the harmonics and unwanted emissions falling within 535-1705 kHz shall not exceed 1000 micro-volts measured across a 50 ohm line impedance stabilization network (LISN).

5.2 Permissible Carrier Current Output Voltages

5.2.1 0-535 kHz: Carrier current devices intended for residential and office buildings are permitted the output voltages listed in Table 1 below when measured, in turn, with 5 ohms and 50 ohms resistive loads. If the duty cycle is not determined by the manufacturer of the device (i.e. duty cycle is system-dependent), then the user manual shall provide clear instructions to the system designer about how to compute the permissible output voltage of the device, based on Table 1 below.

5.2.2 535-1705 kHz: For carrier current devices that have fundamental frequencies of 535 kHz to 1705 kHz, the level of the fundamental and harmonics falling within this band shall not exceed 1000 micro-volts when measured across a 50 ohm LISN, except for transmissions intended for AM broadcast receivers, in which case see Section 2(b) above.

5.2.3 Above 1705 kHz: No conducted limits above 1705 kHz can be established at this time as they require further study. When such conducted limits are established, they will be proposed as an alternative to radiated emissions measurement for demonstrating compliance with limits of radio noise emissions above 1705 kHz.

5.3 Radiated Emissions Limits (Devices Operating Above 1705 kHz)

5.3.1 The field strength of radiated emissions from AC wire carrier current devices shall not exceed the following values in Table 2 and Table 3.

Table 1: Permissible Carrier Current Output Voltages for Installation in Residential and Office Buildings
Frequency Range Permissible Carrier Current Output Voltages
Below 9 kHz No limits
9 to 95 kHzFootnote 2 15.0 volts pk-pk (or 5.3 volts rms)
105 to 185 kHz2 15.0 volts pk-pk (or 5.3 volts rms)
185-535 kHz 0.45(B/D)1/2 volts pk-pk for devices intended for connection to 120 VAC lines and 0.90(B/D)1/2 volts pk-pk for devices intended for connection to 240 VAC lines, or 15 volts pk-pk, whichever is the lesser voltage. B = bandwidth in kHz (-6 dB points, i.e. when the spectral density has decreased by 6 dB). D = duty cycle, e.g. D = 1.0 for continuous transmission. When B is less than 4.8 kHz, B = 4.8 may be used

Table 2: Radiated field strength limit for devices operating between 1705 kHz and 30 MHz
Frequency of Emission (MHz) Field Strength (micro-volt/meter) at 30 metres
1.705-30Footnote 3 30

Note: Using CISPR quasi-peak detector with a bandwidth of 9 kHz.

Table 3: Radiated field strength limits for devices operating above 30 MHz
Frequency of Emission (MHz) Field Strength (micro-volt/metre) at 3 metres
30-88 100
88-216 150
216-960 200
Above 960 500

Note: Using CISPR quasi-peak detector of 120 kHz bandwidth for the band 30-960 MHz, and an average detector of 1 MHz bandwidth above 960 MHz.

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6. Procedural Requirements

6.1 A record of the measurement method and results shall be retained by the manufacturer or importer for a period of at least five years, and made available for examination on request by the Department.

6.2 A label indicating compliance must accompany the carrier current device to the end user. The label must be affixed to the apparatus. Suggested text in English and in French for the notice indicating compliance with this standard is "complies with IC: ICES-006; en conformité avec IC: NMB-006". When size or other constraints do not permit this, the label may be abbreviated to "IC: ICES/NMB-006" with the full notice printed in the user manual.

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7. Reference Publications

7.1 This standard refers to the following publications and, where such reference is made, it shall be to the editions listed below.

(1) CSA Standard C108.1.5 M-85, Line Impedance Stabilization Network (LISN).

(2) CSA Standard C108.1.1-1977, Electromagnetic Interference Measuring Instrument-C.I.S.P.R. Type.

(3) Industry Canada Radio Standards Specification 210 (RSS-210), Low Power Licence-Exempt Radiocommunication Devices (All Frequency Bands).

(4) Industry Canada Radio Standards Specification Gen (RSS-Gen), General Requirements and Information for the Certification of Radiocommunication Equipment.

(5) ANSI C63.4.-2003, American National Standard for Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz.

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Footnotes

Return to footnote reference 1 As an alternative procedure, the measuring antenna height can be set at 1 meter instead of a height over a range of 1 to 4 meters above the reflecting plane (see section 5.4.5 in ANSI C63.4)

Return to footnote reference 2 The frequency table above does not include 100 kHz because it is a restricted frequency; it is the LORAN C radio navigation frequency. Carrier current devices that use the band 95-105 kHz, or spread spectrum systems that include this band, may do so, but must cease operation if found to cause interference. It should be noted that the voltage limits in Table 1 are not to be measured across an LISN connected to the AC wiring; these voltages are to be measured at the factory with 5 ohm and 50 ohm dummy loads. If the aggregate interference in any area or city is found to cause unacceptable interference to the authorized users, Industry Canada may revise the permissible voltage levels. Therefore, manufacturers should limit the duty cycle (transmission on-time) of their devices wherever possible.

Return to footnote reference 3 The frequency 5680 kHz is a restricted frequency used by NAV CANADA and DND for air-to-ground long-range communication operations in remote regions of Canada. For AC wire carrier current devices operating at this frequency, precautions must be taken to ensure that the device does not cause harmful interference to authorized users. If harmful interference is found to occur, the carrier current device shall be required to cease operation until the harmful interference has been eliminated.