UL 1018-2017 pdf download
UL 1018-2017 pdf download.Electric Aquarium Equipment.
C) The Composite Operational and Cycling Test Is to be conducted for 14 days at temperature extremes of 0°C (0°F) and 70°C (158°F);
d) The Humidity Class is to be based on the appliance’s intended end use and is to be used for the Humidity Test;
e) A vibration level of 5 g is to be used for the Vibration Test:
f) The computational investigation is not applicable to equipment covered by this end product standard;
9) When the Demonstrated Method Test is conducted, the multiplier for the test acceleration factor is to be 576.30 for intermittent use appliances, or 5763.00 for continuous use appliances, The test acceleration factor equation Is to be based on a 25°C use ambient;
h) The Endurance Test is to be conducted concurrently with the Operational Test. The control shall perform its intended function while being conditioned for 14 days In an ambient air temperature of 60°C (140°F). or 10°C (18°F) greater than the operating temperature of the contro& whichever is higher. Dunng the test, the control is to be operated in a manner representing normal use;
I) For the Electrical Fast Transient Burst Test, test level 1 is to be used: and
j) Conduct a failure-mode and effect analysis (FMEA).
k) If software is relied upon as part of the protective electronic control, ii shall be evaluated as software Class 1 in accordance with the Standard for Software in Programmable Components, UL 1998.
27.4.4 Unless otherwise specifted in this Standard, protective controls shall be evaluated for 100,000 cycles for Type 2 devices, and 6,000 cycles for Type 1 devices, with rated current.
27.5 Controls using a temperature sensing device
27.5.1 A temperature sensing positive temperature coefficient (PTC) or negative temperature coefficient (NTC) thermistor, that performs the same function as an operating or protective control, shall be tested using the following number of cycles when testing a sensing device in accordance with the endurance test:
a) For a device employed as a operating device — 6000 cycles;
b) For a device employed as a protective device — 100,000 cycles; and
C) For a device employed as a combination operating and protective device — 100.000 cycles.
28 Lampholdefa
28.1 The screw shell metal of a lampholder shall be stainless steel, nickel-plated aluminum, or nickel-plated copper alloy unless the lampholder is located so that it is unlikely to be exposed to moisture.
28.2 The spacing between an uninsulated live part, such as a screw shell or lamp envelope, and water in an aquarium tank shall not be less than 1/2 inch (12.7 mm). In measuring the distance between the water and a lamp envelope. it Is to be assumed that the lamp envelope Is symmetrical about the screw shell axis The spacing shall be evaluated with the appliance installed as discussed in the instruction manual, on an aquarium tank having the dimensions specified in the instruction manual. The aquarium tank Is to be filled with the maximum quantity of water It can hold. Any accessofy o part of the appliance that is removable without the use of a tool is to be removed for the purpose of this requirement.
28.3 A lampholder shall be constructed of porcelain, cold-molded phenolic, urea, or other moisture- resistant material determined to be equivalent.
28.4 The requirements In 28.3 preclude the use of fiber as electrical insulabon In lampholders.
29 Capacitors
29.1 A capacitor provided as a part of a capacitor motor and a capacitor connected across the line (such as for radio interference elimination or power factor correction) shall be housed within an enclosure or container so that the plates will not be subject to mechanical abuse, and there will not be emission of flame or molten metal resulting from failure of the capacitor. The container shall be of metal providing strength and protection not less than that of uncoated steel having a thickness ci 0,020 inch (0.51 mm). Sheet metal less than 0.026 inch (0.66 mm) thick is not recommended.
Exception: The individual container of a capacitor may be of sheet metal thinner than spec, led or of material other than metal if the capacitor is mounted in an enclosure that houses other parts of the a.pphance, prov.cied that such a box, case, and sümlar housing Is acceptable for The enclosure of current -carrying paris.
