ISO 8052:1990

Overview

ISO 8052:1990 - Mopeds - Direct current flasher units specifies the electrical characteristics and type‑test requirements for d.c. flasher units intended for mopeds with 6 V or 12 V electrical systems. This second edition (1990) cancels and replaces the 1984 edition and forms part of a family of vehicle lighting standards. The standard defines identification, working voltages for test conditions, required markings and the test procedures that confirm a flasher’s safe and reliable operation as a direction indicator and/or hazard warning device.

Key topics and technical requirements

• Scope and identification: Flasher units must be marked with manufacturer name, rated voltage, terminal identification and lamp wattages. Applies to mopeds as defined in ISO 3833.
• Working voltages and test voltages: Tests use nominal working voltages corresponding to 6 V and 12 V systems (test references use voltages such as 6.5 V, 7 V, 13 V and 14 V).
• Flash-rate and duty cycle: When functioning as direction indicators, flash-rate requirements are enforced (typical range 60–120 cycles/min) and the current “on”-time must fall between 30% and 75% of each cycle.
• Starting performance: First “on”-time must begin within 1 s of switching on; first “off”-time within 1.5 s; initial “on”-time must be at least 0.2 s.
• Voltage drop limits: With prescribed supply voltages, the minimum voltage drop between input and output terminals must not exceed 0.4 V for direction indicator operation and 0.5 V for hazard warning operation.
• Overload and electrical robustness: The flasher must survive a maximum current condition (test config requires withstanding 35 A for a limited interval during overload testing).
• Environmental and mechanical tests: Includes vibration (20–200 Hz, high acceleration amplitudes), impact tests, resistance to heat/cold/humidity (+40 °C at 90–95% RH, +80 °C, −40 °C) and endurance cycles (including long continuous operation and timed on/off cycles).
• Type‑test sampling: Typical sample size and individual test sequencing are specified (e.g., 20 samples for full sequence).

Applications and who uses it

• Moped and small vehicle manufacturers selecting or designing d.c. flasher units.
• Component suppliers and flasher‑unit designers validating product performance and compliance.
• Test laboratories performing type‑approval and conformity assessments.
• Regulatory and certification bodies adopting consistent electrical and safety criteria for vehicle lighting.
• Quality assurance and safety engineers ensuring reliability under vibration, temperature and electrical stress.

Related standards

• ISO 7398 - Motorcycles - Direct current flasher units
• ISO 7399 - Motorcycles - Alternating current flasher units
• ISO 7400 - Mopeds - Alternating current flasher units
• ISO 3833 - Road vehicles - Terms and definitions
• IEC 810 - Lamps for road vehicles - Performance requirements

Keywords: ISO 8052:1990, mopeds, direct current flasher units, DC flasher, type‑testing, flash‑rate, flasher endurance, vehicle lighting standard.