# What is the maximum continuous rating of the boiler?

Maximum continuous rating (MCR) refers to a steam boiler's capacity to continuously and readily create and deliver the specified quantity of steam without any deficiencies or undesirable consequences (for example, overloading, slagging, or overheating) on the main steam boiler and its components. The maximum continuous output of a boiler is usually defined by its manufacturer. However it can be found out through testing...

## What is the max. continuous current?

Maximum Continuous Current (MCC) is a value that we publish in our technical specifications and is calculated by operating the compressor at a specified load while reducing the voltage until the compressor protector trips. MCC is the measured current shortly prior to the trip of the protector. For single-stage compressors, the MCC is equal to the continuous rated output pressure ratio times the continuous rated motor speed. For two-stage compressors, the MCC is equal to the sum of the MCCs of the individual stages.

For example, a two-stage compressor with full capacity on both stages will run continuously at its highest MCC of 2 x 9.6 = 19.2 A if the voltage is 120 V alternating current (AC) or 96 V direct current (DC). If the voltage drops to 115 V AC or 90 V DC, the MCC will drop to 1.8 A. At this lower current, the compressor will not run as fast, but it will still deliver its full capacity of gas for as long as there are leaks in the system outside of the compressor.

The MCC rating should be used with caution when installing air compression systems for use with remote gas appliances such as stoves, heaters, and dryers. The installation manual or technition should be consulted to ensure that the appliance can handle the maximum expected current from the compressor.

## What is the max power rating?

In general, a "max power rating" denotes the greatest amount of power that may be safely sustained without causing failure. This is a more realistic maximum specification than the arbitrary usage of peak power in most cases. The actual power drawn by a device will often be less than its maximum power rating, but never more.

Maximum power ratings are usually specified as either continuous or burst. Continuous power ratings indicate the maximum amount of power that can be delivered over time by a single battery cell or group of cells. Burst power ratings indicate the maximum peak power that can be delivered by a single cell or group of cells for a limited period of time. For example, a battery with a maximum burst power rating of 500 watts would be able to deliver 500 watts for one minute, followed by idling mode for another minute before shutting down. A battery with a continuous power rating of 1500 watts would be capable of delivering 1.5 kilowatts for an entire hour without failing.

The maximum power that can be drawn from each cell of a battery depends on how much current it can handle at one time. Most batteries have a maximum current capacity of 2 amps per cell. This means that no more than two amps can flow through any one cell or group of cells at any given time. Larger currents cause overheating and eventual damage/failure of the battery.

## Which is the correct rating for a boiler?

Evaluation Shell boiler manufacturers commonly use the "from and at" rating to give a boiler a rating that reflects the quantity of steam in kg/h that the boiler can produce "from and at 100 deg. C." at atmospheric pressure. The boiler would therefore have provided 2 257 kJ of heat to each kilogram of steam. This is also known as its working capacity.

Heating Oil Boiler manufacturers usually list their products' ratings in milliliters (mL) of oil used per hour under normal conditions. For example, a boiler that uses 5 mL of oil per hour at maximum heating output would have a total rating of 20 mL per hour all-time. Rating is generally expressed as a single number called the Btu rate. One billion Btu equals one gigajoule (GJ).

Natural Gas Boiler manufacturers list their products' ratings in thousands of cubic feet (ft3) of natural gas used per hour under normal conditions. For example, a boiler that uses 7 ft3 of natural gas per hour at maximum heating output would have a total rating of 56 ft3 per hour all-time. One billion Btu equals one GJ.

Electricity Boiler manufacturers list their products' ratings in watts (W) needed to generate 1 kW per hour. For example, a boiler that needs 0.5 W to work at its maximum heating output would have a total rating of 1.

##### Teresa Winters

Teresa Winters is a passionate writer and interior designer who has been in the industry for over 15 years. She specializes in home design and decorating, with a focus on creating spaces that reflect her clientsâ€™ unique personalities. Teresa loves to create living spaces that are both functional and beautiful, paying close attention to detail while considering each client's style needs. She also writes about her gardening tips and gives a lot of recommendations about shopping for the best home products.

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